| <!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>Tutorial: Querying data · Apache Druid</title><meta name="viewport" content="width=device-width"/><link rel="canonical" href="https://druid.apache.org/docs/0.18.1/tutorials/tutorial-query.html"/><meta name="generator" content="Docusaurus"/><meta name="description" content="<!--"/><meta name="docsearch:language" content="en"/><meta name="docsearch:version" content="0.18.1" /><meta property="og:title" content="Tutorial: Querying data · Apache Druid"/><meta property="og:type" content="website"/><meta property="og:url" content="https://druid.apache.org/index.html"/><meta property="og:description" content="<!--"/><meta property="og:image" content="https://druid.apache.org/img/druid_nav.png"/><meta name="twitter:card" content="summary"/><meta name="twitter:image" content="https://druid.apache.org/img/druid_nav.png"/><link rel="shortcut icon" href="/img/favicon.png"/><link rel="stylesheet" href="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.css"/><link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/styles/default.min.css"/><script async="" src="https://www.googletagmanager.com/gtag/js?id=UA-131010415-1"></script><script> |
| window.dataLayer = window.dataLayer || []; |
| function gtag(){dataLayer.push(arguments); } |
| gtag('js', new Date()); |
| gtag('config', 'UA-131010415-1'); |
| </script><link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.7.2/css/all.css"/><link rel="stylesheet" href="/css/code-block-buttons.css"/><script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.4/clipboard.min.js"></script><script type="text/javascript" src="/js/code-block-buttons.js"></script><script src="/js/scrollSpy.js"></script><link rel="stylesheet" href="/css/main.css"/><script src="/js/codetabs.js"></script></head><body class="sideNavVisible separateOnPageNav"><div class="fixedHeaderContainer"><div class="headerWrapper wrapper"><header><a href="/"><img class="logo" src="/img/druid_nav.png" alt="Apache Druid"/></a><div class="navigationWrapper navigationSlider"><nav class="slidingNav"><ul class="nav-site nav-site-internal"><li class=""><a href="/technology" target="_self">Technology</a></li><li class=""><a href="/use-cases" target="_self">Use Cases</a></li><li class=""><a href="/druid-powered" target="_self">Powered By</a></li><li class="siteNavGroupActive"><a href="/docs/0.18.1/design/index.html" target="_self">Docs</a></li><li class=""><a href="/community/" target="_self">Community</a></li><li class=""><a href="https://www.apache.org" target="_self">Apache</a></li><li class=""><a href="/downloads.html" target="_self">Download</a></li><li class="navSearchWrapper reactNavSearchWrapper"><input type="text" id="search_input_react" placeholder="Search" title="Search"/></li></ul></nav></div></header></div></div><div class="navPusher"><div class="docMainWrapper wrapper"><div class="docsNavContainer" id="docsNav"><nav class="toc"><div class="toggleNav"><section class="navWrapper wrapper"><div class="navBreadcrumb wrapper"><div class="navToggle" id="navToggler"><div class="hamburger-menu"><div class="line1"></div><div class="line2"></div><div class="line3"></div></div></div><h2><i>›</i><span>Tutorials</span></h2><div class="tocToggler" id="tocToggler"><i class="icon-toc"></i></div></div><div class="navGroups"><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Getting started<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/0.18.1/design/index.html">Introduction to Apache Druid</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/tutorials/index.html">Quickstart</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/tutorials/docker.html">Docker</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/single-server.html">Single server deployment</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/tutorials/cluster.html">Clustered deployment</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Tutorials<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/0.18.1/tutorials/tutorial-batch.html">Loading files natively</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/tutorials/tutorial-kafka.html">Load from Apache Kafka</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/tutorials/tutorial-batch-hadoop.html">Load from Apache Hadoop</a></li><li class="navListItem navListItemActive"><a class="navItem" href="/docs/0.18.1/tutorials/tutorial-query.html">Querying data</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/tutorials/tutorial-rollup.html">Roll-up</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/tutorials/tutorial-retention.html">Configuring data retention</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/tutorials/tutorial-update-data.html">Updating existing data</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/tutorials/tutorial-compaction.html">Compacting segments</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/tutorials/tutorial-delete-data.html">Deleting data</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/tutorials/tutorial-ingestion-spec.html">Writing an ingestion spec</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/tutorials/tutorial-transform-spec.html">Transforming input data</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/tutorials/tutorial-kerberos-hadoop.html">Kerberized HDFS deep storage</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Design<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/0.18.1/design/architecture.html">Design</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/design/segments.html">Segments</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/design/processes.html">Processes and servers</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/dependencies/deep-storage.html">Deep storage</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/dependencies/metadata-storage.html">Metadata storage</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/dependencies/zookeeper.html">ZooKeeper</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Ingestion<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/0.18.1/ingestion/index.html">Ingestion</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/ingestion/data-formats.html">Data formats</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/ingestion/schema-design.html">Schema design tips</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/ingestion/data-management.html">Data management</a></li><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Stream ingestion</h4><ul><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/kafka-ingestion.html">Apache Kafka</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/kinesis-ingestion.html">Amazon Kinesis</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/ingestion/tranquility.html">Tranquility</a></li></ul></div><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Batch ingestion</h4><ul><li class="navListItem"><a class="navItem" href="/docs/0.18.1/ingestion/native-batch.html">Native batch</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/ingestion/hadoop.html">Hadoop-based</a></li></ul></div><li class="navListItem"><a class="navItem" href="/docs/0.18.1/ingestion/tasks.html">Task reference</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/ingestion/faq.html">Troubleshooting FAQ</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Querying<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/sql.html">Druid SQL</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/querying.html">Native queries</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/query-execution.html">Query execution</a></li><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Concepts</h4><ul><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/datasource.html">Datasources</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/joins.html">Joins</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/lookups.html">Lookups</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/multi-value-dimensions.html">Multi-value dimensions</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/multitenancy.html">Multitenancy</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/caching.html">Query caching</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/query-context.html">Context parameters</a></li></ul></div><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Native query types</h4><ul><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/timeseriesquery.html">Timeseries</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/topnquery.html">TopN</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/groupbyquery.html">GroupBy</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/scan-query.html">Scan</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/searchquery.html">Search</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/timeboundaryquery.html">TimeBoundary</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/segmentmetadataquery.html">SegmentMetadata</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/datasourcemetadataquery.html">DatasourceMetadata</a></li></ul></div><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Native query components</h4><ul><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/filters.html">Filters</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/granularities.html">Granularities</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/dimensionspecs.html">Dimensions</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/aggregations.html">Aggregations</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/post-aggregations.html">Post-aggregations</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/misc/math-expr.html">Expressions</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/having.html">Having filters (groupBy)</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/limitspec.html">Sorting and limiting (groupBy)</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/topnmetricspec.html">Sorting (topN)</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/sorting-orders.html">String comparators</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/virtual-columns.html">Virtual columns</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/geo.html">Spatial filters</a></li></ul></div></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Configuration<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/0.18.1/configuration/index.html">Configuration reference</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions.html">Extensions</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/configuration/logging.html">Logging</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Operations<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/management-uis.html">Management UIs</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/basic-cluster-tuning.html">Basic cluster tuning</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/api-reference.html">API reference</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/high-availability.html">High availability</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/rolling-updates.html">Rolling updates</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/rule-configuration.html">Retaining or automatically dropping data</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/metrics.html">Metrics</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/alerts.html">Alerts</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/other-hadoop.html">Working with different versions of Apache Hadoop</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/http-compression.html">HTTP compression</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/tls-support.html">TLS support</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/password-provider.html">Password providers</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/dump-segment.html">dump-segment tool</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/reset-cluster.html">reset-cluster tool</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/insert-segment-to-db.html">insert-segment-to-db tool</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/pull-deps.html">pull-deps tool</a></li><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Misc</h4><ul><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/deep-storage-migration.html">Deep storage migration</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/druid-console.html">Web console</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/export-metadata.html">Export Metadata Tool</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/getting-started.html">Getting started with Apache Druid</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/metadata-migration.html">Metadata Migration</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/segment-optimization.html">Segment Size Optimization</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/operations/use_sbt_to_build_fat_jar.html">Content for build.sbt</a></li></ul></div></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Development<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/overview.html">Developing on Druid</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/modules.html">Creating extensions</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/javascript.html">JavaScript functionality</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/build.html">Build from source</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/versioning.html">Versioning</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/experimental.html">Experimental features</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Misc<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/0.18.1/misc/papers-and-talks.html">Papers</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle collapsible">Hidden<span class="arrow"><svg width="24" height="24" viewBox="0 0 24 24"><path fill="#565656" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"></path><path d="M0 0h24v24H0z" fill="none"></path></svg></span></h3><ul class="hide"><li class="navListItem"><a class="navItem" href="/docs/0.18.1/comparisons/druid-vs-elasticsearch.html">Apache Druid vs Elasticsearch</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/comparisons/druid-vs-key-value.html">Apache Druid vs. Key/Value Stores (HBase/Cassandra/OpenTSDB)</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/comparisons/druid-vs-kudu.html">Apache Druid vs Kudu</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/comparisons/druid-vs-redshift.html">Apache Druid vs Redshift</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/comparisons/druid-vs-spark.html">Apache Druid vs Spark</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/comparisons/druid-vs-sql-on-hadoop.html">Apache Druid vs SQL-on-Hadoop</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/design/auth.html">Authentication and Authorization</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/design/broker.html">Broker</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/design/coordinator.html">Coordinator Process</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/design/historical.html">Historical Process</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/design/indexer.html">Indexer Process</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/design/indexing-service.html">Indexing Service</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/design/middlemanager.html">MiddleManager Process</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/design/overlord.html">Overlord Process</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/design/router.html">Router Process</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/design/peons.html">Peons</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/approximate-histograms.html">Approximate Histogram aggregators</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/avro.html">Apache Avro</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/azure.html">Microsoft Azure</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/bloom-filter.html">Bloom Filter</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/datasketches-extension.html">DataSketches extension</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/datasketches-hll.html">DataSketches HLL Sketch module</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/datasketches-quantiles.html">DataSketches Quantiles Sketch module</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/datasketches-theta.html">DataSketches Theta Sketch module</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/datasketches-tuple.html">DataSketches Tuple Sketch module</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/druid-basic-security.html">Basic Security</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/druid-kerberos.html">Kerberos</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/druid-lookups.html">Cached Lookup Module</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/google.html">Google Cloud Storage</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/hdfs.html">HDFS</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/kafka-extraction-namespace.html">Apache Kafka Lookups</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/lookups-cached-global.html">Globally Cached Lookups</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/mysql.html">MySQL Metadata Store</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/orc.html">ORC Extension</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/parquet.html">Apache Parquet Extension</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/postgresql.html">PostgreSQL Metadata Store</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/protobuf.html">Protobuf</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/s3.html">S3-compatible</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/simple-client-sslcontext.html">Simple SSLContext Provider Module</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/stats.html">Stats aggregator</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-core/test-stats.html">Test Stats Aggregators</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-contrib/ambari-metrics-emitter.html">Ambari Metrics Emitter</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-contrib/cassandra.html">Apache Cassandra</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-contrib/cloudfiles.html">Rackspace Cloud Files</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-contrib/distinctcount.html">DistinctCount Aggregator</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-contrib/graphite.html">Graphite Emitter</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/hll-old.html">Cardinality/HyperUnique aggregators</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/querying/select-query.html">Select</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-contrib/influx.html">InfluxDB Line Protocol Parser</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-contrib/influxdb-emitter.html">InfluxDB Emitter</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-contrib/kafka-emitter.html">Kafka Emitter</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-contrib/materialized-view.html">Materialized View</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-contrib/momentsketch-quantiles.html">Moment Sketches for Approximate Quantiles module</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-contrib/moving-average-query.html">Moving Average Query</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-contrib/opentsdb-emitter.html">OpenTSDB Emitter</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-contrib/redis-cache.html">Druid Redis Cache</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-contrib/sqlserver.html">Microsoft SQLServer</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-contrib/statsd.html">StatsD Emitter</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-contrib/tdigestsketch-quantiles.html">T-Digest Quantiles Sketch module</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-contrib/thrift.html">Thrift</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/development/extensions-contrib/time-min-max.html">Timestamp Min/Max aggregators</a></li><li class="navListItem"><a class="navItem" href="/docs/0.18.1/ingestion/standalone-realtime.html">Realtime Process</a></li></ul></div></div></section></div><script> |
| var coll = document.getElementsByClassName('collapsible'); |
| var checkActiveCategory = true; |
| for (var i = 0; i < coll.length; i++) { |
| var links = coll[i].nextElementSibling.getElementsByTagName('*'); |
| if (checkActiveCategory){ |
| for (var j = 0; j < links.length; j++) { |
| if (links[j].classList.contains('navListItemActive')){ |
| coll[i].nextElementSibling.classList.toggle('hide'); |
| coll[i].childNodes[1].classList.toggle('rotate'); |
| checkActiveCategory = false; |
| break; |
| } |
| } |
| } |
| |
| coll[i].addEventListener('click', function() { |
| var arrow = this.childNodes[1]; |
| arrow.classList.toggle('rotate'); |
| var content = this.nextElementSibling; |
| content.classList.toggle('hide'); |
| }); |
| } |
| |
| document.addEventListener('DOMContentLoaded', function() { |
| createToggler('#navToggler', '#docsNav', 'docsSliderActive'); |
| createToggler('#tocToggler', 'body', 'tocActive'); |
| |
| var headings = document.querySelector('.toc-headings'); |
| headings && headings.addEventListener('click', function(event) { |
| var el = event.target; |
| while(el !== headings){ |
| if (el.tagName === 'A') { |
| document.body.classList.remove('tocActive'); |
| break; |
| } else{ |
| el = el.parentNode; |
| } |
| } |
| }, false); |
| |
| function createToggler(togglerSelector, targetSelector, className) { |
| var toggler = document.querySelector(togglerSelector); |
| var target = document.querySelector(targetSelector); |
| |
| if (!toggler) { |
| return; |
| } |
| |
| toggler.onclick = function(event) { |
| event.preventDefault(); |
| |
| target.classList.toggle(className); |
| }; |
| } |
| }); |
| </script></nav></div><div class="container mainContainer"><div class="wrapper"><div class="post"><header class="postHeader"><a class="edit-page-link button" href="https://github.com/apache/druid/edit/master/docs/tutorials/tutorial-query.md" target="_blank" rel="noreferrer noopener">Edit</a><h1 class="postHeaderTitle">Tutorial: Querying data</h1></header><article><div><span><!-- |
| ~ Licensed to the Apache Software Foundation (ASF) under one |
| ~ or more contributor license agreements. See the NOTICE file |
| ~ distributed with this work for additional information |
| ~ regarding copyright ownership. The ASF licenses this file |
| ~ to you under the Apache License, Version 2.0 (the |
| ~ "License"); you may not use this file except in compliance |
| ~ with the License. You may obtain a copy of the License at |
| ~ |
| ~ http://www.apache.org/licenses/LICENSE-2.0 |
| ~ |
| ~ Unless required by applicable law or agreed to in writing, |
| ~ software distributed under the License is distributed on an |
| ~ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| ~ KIND, either express or implied. See the License for the |
| ~ specific language governing permissions and limitations |
| ~ under the License. |
| --> |
| <p>This tutorial will demonstrate how to query data in Apache Druid, with examples for Druid SQL and Druid's native query format.</p> |
| <p>The tutorial assumes that you've already completed one of the 4 ingestion tutorials, as we will be querying the sample Wikipedia edits data.</p> |
| <ul> |
| <li><a href="/docs/0.18.1/tutorials/tutorial-batch.html">Tutorial: Loading a file</a></li> |
| <li><a href="/docs/0.18.1/tutorials/tutorial-kafka.html">Tutorial: Loading stream data from Kafka</a></li> |
| <li><a href="/docs/0.18.1/tutorials/tutorial-batch-hadoop.html">Tutorial: Loading a file using Hadoop</a></li> |
| </ul> |
| <p>Druid queries are sent over HTTP. |
| The Druid console includes a view to issue queries to Druid and nicely format the results.</p> |
| <h2><a class="anchor" aria-hidden="true" id="druid-sql-queries"></a><a href="#druid-sql-queries" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Druid SQL queries</h2> |
| <p>Druid supports a dialect of SQL for querying.</p> |
| <p>This query retrieves the 10 Wikipedia pages with the most page edits on 2015-09-12.</p> |
| <pre><code class="hljs css language-sql"><span class="hljs-keyword">SELECT</span> page, <span class="hljs-keyword">COUNT</span>(*) <span class="hljs-keyword">AS</span> Edits |
| <span class="hljs-keyword">FROM</span> wikipedia |
| <span class="hljs-keyword">WHERE</span> <span class="hljs-built_in">TIMESTAMP</span> <span class="hljs-string">'2015-09-12 00:00:00'</span> <= <span class="hljs-string">"__time"</span> <span class="hljs-keyword">AND</span> <span class="hljs-string">"__time"</span> < <span class="hljs-built_in">TIMESTAMP</span> <span class="hljs-string">'2015-09-13 00:00:00'</span> |
| <span class="hljs-keyword">GROUP</span> <span class="hljs-keyword">BY</span> page |
| <span class="hljs-keyword">ORDER</span> <span class="hljs-keyword">BY</span> Edits <span class="hljs-keyword">DESC</span> |
| <span class="hljs-keyword">LIMIT</span> <span class="hljs-number">10</span> |
| </code></pre> |
| <p>Let's look at the different ways to issue this query.</p> |
| <h3><a class="anchor" aria-hidden="true" id="query-sql-via-the-console"></a><a href="#query-sql-via-the-console" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Query SQL via the console</h3> |
| <p>You can issue the above query from the console.</p> |
| <p><img src="../assets/tutorial-query-01.png" alt="Query autocomplete" title="Query autocomplete"></p> |
| <p>The console query view provides autocomplete functionality with inline documentation.</p> |
| <p><img src="../assets/tutorial-query-02.png" alt="Query options" title="Query options"></p> |
| <p>You can also configure extra <a href="/docs/0.18.1/querying/query-context.html">context flags</a> to be sent with the query from the <code>...</code> options menu.</p> |
| <p>Note that the console will (by default) wrap your SQL queries in a limit where appropriate so that queries such as <code>SELECT * FROM wikipedia</code> can complete. |
| You can turn off this behavior from the <code>Smart query limit</code> toggle.</p> |
| <p><img src="../assets/tutorial-query-03.png" alt="Query actions" title="Query actions"></p> |
| <p>The query view provides contextual actions that can write and modify the query for you.</p> |
| <h3><a class="anchor" aria-hidden="true" id="query-sql-via-dsql"></a><a href="#query-sql-via-dsql" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Query SQL via dsql</h3> |
| <p>For convenience, the Druid package includes a SQL command-line client, located at <code>bin/dsql</code> from the Druid package root.</p> |
| <p>Let's now run <code>bin/dsql</code>; you should see the following prompt:</p> |
| <pre><code class="hljs css language-bash">Welcome to dsql, the <span class="hljs-built_in">command</span>-line client <span class="hljs-keyword">for</span> Druid SQL. |
| Type <span class="hljs-string">"\h"</span> <span class="hljs-keyword">for</span> <span class="hljs-built_in">help</span>. |
| dsql> |
| </code></pre> |
| <p>To submit the query, paste it to the <code>dsql</code> prompt and press enter:</p> |
| <pre><code class="hljs css language-bash">dsql> SELECT page, COUNT(*) AS Edits FROM wikipedia WHERE <span class="hljs-string">"__time"</span> BETWEEN TIMESTAMP <span class="hljs-string">'2015-09-12 00:00:00'</span> AND TIMESTAMP <span class="hljs-string">'2015-09-13 00:00:00'</span> GROUP BY page ORDER BY Edits DESC LIMIT 10; |
| ┌──────────────────────────────────────────────────────────┬───────┐ |
| │ page │ Edits │ |
| ├──────────────────────────────────────────────────────────┼───────┤ |
| │ Wikipedia:Vandalismusmeldung │ 33 │ |
| │ User:Cyde/List of candidates <span class="hljs-keyword">for</span> speedy deletion/Subpage │ 28 │ |
| │ Jeremy Corbyn │ 27 │ |
| │ Wikipedia:Administrators<span class="hljs-string">' noticeboard/Incidents │ 21 │ |
| │ Flavia Pennetta │ 20 │ |
| │ Total Drama Presents: The Ridonculous Race │ 18 │ |
| │ User talk:Dudeperson176123 │ 18 │ |
| │ Wikipédia:Le Bistro/12 septembre 2015 │ 18 │ |
| │ Wikipedia:In the news/Candidates │ 17 │ |
| │ Wikipedia:Requests for page protection │ 17 │ |
| └──────────────────────────────────────────────────────────┴───────┘ |
| Retrieved 10 rows in 0.06s. |
| </span></code></pre> |
| <h3><a class="anchor" aria-hidden="true" id="query-sql-over-http"></a><a href="#query-sql-over-http" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Query SQL over HTTP</h3> |
| <p>The SQL queries are submitted as JSON over HTTP.</p> |
| <p>The tutorial package includes an example file that contains the SQL query shown above at <code>quickstart/tutorial/wikipedia-top-pages-sql.json</code>. Let's submit that query to the Druid Broker:</p> |
| <pre><code class="hljs css language-bash">curl -X <span class="hljs-string">'POST'</span> -H <span class="hljs-string">'Content-Type:application/json'</span> -d @quickstart/tutorial/wikipedia-top-pages-sql.json http://localhost:8888/druid/v2/sql |
| </code></pre> |
| <p>The following results should be returned:</p> |
| <pre><code class="hljs css language-json">[ |
| { |
| <span class="hljs-attr">"page"</span>: <span class="hljs-string">"Wikipedia:Vandalismusmeldung"</span>, |
| <span class="hljs-attr">"Edits"</span>: <span class="hljs-number">33</span> |
| }, |
| { |
| <span class="hljs-attr">"page"</span>: <span class="hljs-string">"User:Cyde/List of candidates for speedy deletion/Subpage"</span>, |
| <span class="hljs-attr">"Edits"</span>: <span class="hljs-number">28</span> |
| }, |
| { |
| <span class="hljs-attr">"page"</span>: <span class="hljs-string">"Jeremy Corbyn"</span>, |
| <span class="hljs-attr">"Edits"</span>: <span class="hljs-number">27</span> |
| }, |
| { |
| <span class="hljs-attr">"page"</span>: <span class="hljs-string">"Wikipedia:Administrators' noticeboard/Incidents"</span>, |
| <span class="hljs-attr">"Edits"</span>: <span class="hljs-number">21</span> |
| }, |
| { |
| <span class="hljs-attr">"page"</span>: <span class="hljs-string">"Flavia Pennetta"</span>, |
| <span class="hljs-attr">"Edits"</span>: <span class="hljs-number">20</span> |
| }, |
| { |
| <span class="hljs-attr">"page"</span>: <span class="hljs-string">"Total Drama Presents: The Ridonculous Race"</span>, |
| <span class="hljs-attr">"Edits"</span>: <span class="hljs-number">18</span> |
| }, |
| { |
| <span class="hljs-attr">"page"</span>: <span class="hljs-string">"User talk:Dudeperson176123"</span>, |
| <span class="hljs-attr">"Edits"</span>: <span class="hljs-number">18</span> |
| }, |
| { |
| <span class="hljs-attr">"page"</span>: <span class="hljs-string">"Wikipédia:Le Bistro/12 septembre 2015"</span>, |
| <span class="hljs-attr">"Edits"</span>: <span class="hljs-number">18</span> |
| }, |
| { |
| <span class="hljs-attr">"page"</span>: <span class="hljs-string">"Wikipedia:In the news/Candidates"</span>, |
| <span class="hljs-attr">"Edits"</span>: <span class="hljs-number">17</span> |
| }, |
| { |
| <span class="hljs-attr">"page"</span>: <span class="hljs-string">"Wikipedia:Requests for page protection"</span>, |
| <span class="hljs-attr">"Edits"</span>: <span class="hljs-number">17</span> |
| } |
| ] |
| </code></pre> |
| <h3><a class="anchor" aria-hidden="true" id="more-druid-sql-examples"></a><a href="#more-druid-sql-examples" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>More Druid SQL examples</h3> |
| <p>Here is a collection of queries to try out:</p> |
| <h4><a class="anchor" aria-hidden="true" id="query-over-time"></a><a href="#query-over-time" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Query over time</h4> |
| <pre><code class="hljs css language-sql"><span class="hljs-keyword">SELECT</span> <span class="hljs-keyword">FLOOR</span>(__time <span class="hljs-keyword">to</span> <span class="hljs-keyword">HOUR</span>) <span class="hljs-keyword">AS</span> HourTime, <span class="hljs-keyword">SUM</span>(deleted) <span class="hljs-keyword">AS</span> LinesDeleted |
| <span class="hljs-keyword">FROM</span> wikipedia <span class="hljs-keyword">WHERE</span> <span class="hljs-string">"__time"</span> <span class="hljs-keyword">BETWEEN</span> <span class="hljs-built_in">TIMESTAMP</span> <span class="hljs-string">'2015-09-12 00:00:00'</span> <span class="hljs-keyword">AND</span> <span class="hljs-built_in">TIMESTAMP</span> <span class="hljs-string">'2015-09-13 00:00:00'</span> |
| <span class="hljs-keyword">GROUP</span> <span class="hljs-keyword">BY</span> <span class="hljs-number">1</span> |
| </code></pre> |
| <p><img src="../assets/tutorial-query-03.png" alt="Query example" title="Query example"></p> |
| <h4><a class="anchor" aria-hidden="true" id="general-group-by"></a><a href="#general-group-by" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>General group by</h4> |
| <pre><code class="hljs css language-sql"><span class="hljs-keyword">SELECT</span> channel, page, <span class="hljs-keyword">SUM</span>(added) |
| <span class="hljs-keyword">FROM</span> wikipedia <span class="hljs-keyword">WHERE</span> <span class="hljs-string">"__time"</span> <span class="hljs-keyword">BETWEEN</span> <span class="hljs-built_in">TIMESTAMP</span> <span class="hljs-string">'2015-09-12 00:00:00'</span> <span class="hljs-keyword">AND</span> <span class="hljs-built_in">TIMESTAMP</span> <span class="hljs-string">'2015-09-13 00:00:00'</span> |
| <span class="hljs-keyword">GROUP</span> <span class="hljs-keyword">BY</span> channel, page |
| <span class="hljs-keyword">ORDER</span> <span class="hljs-keyword">BY</span> <span class="hljs-keyword">SUM</span>(added) <span class="hljs-keyword">DESC</span> |
| </code></pre> |
| <p><img src="../assets/tutorial-query-04.png" alt="Query example" title="Query example"></p> |
| <h4><a class="anchor" aria-hidden="true" id="select-raw-data"></a><a href="#select-raw-data" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Select raw data</h4> |
| <pre><code class="hljs css language-sql"><span class="hljs-keyword">SELECT</span> <span class="hljs-keyword">user</span>, page |
| <span class="hljs-keyword">FROM</span> wikipedia <span class="hljs-keyword">WHERE</span> <span class="hljs-string">"__time"</span> <span class="hljs-keyword">BETWEEN</span> <span class="hljs-built_in">TIMESTAMP</span> <span class="hljs-string">'2015-09-12 02:00:00'</span> <span class="hljs-keyword">AND</span> <span class="hljs-built_in">TIMESTAMP</span> <span class="hljs-string">'2015-09-12 03:00:00'</span> |
| <span class="hljs-keyword">LIMIT</span> <span class="hljs-number">5</span> |
| </code></pre> |
| <p><img src="../assets/tutorial-query-05.png" alt="Query example" title="Query example"></p> |
| <h3><a class="anchor" aria-hidden="true" id="explain-query-plan"></a><a href="#explain-query-plan" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Explain query plan</h3> |
| <p>Druid SQL has the ability to explain the query plan for a given query. |
| In the console this functionality is accessible from the <code>...</code> button.</p> |
| <p><img src="../assets/tutorial-query-06.png" alt="Explain query" title="Explain query"></p> |
| <p>If you are querying in other ways you can get the plan by prepending <code>EXPLAIN PLAN FOR</code> to a Druid SQL query.</p> |
| <p>Using a query from an example above:</p> |
| <p><code>EXPLAIN PLAN FOR SELECT page, COUNT(*) AS Edits FROM wikipedia WHERE "__time" BETWEEN TIMESTAMP '2015-09-12 00:00:00' AND TIMESTAMP '2015-09-13 00:00:00' GROUP BY page ORDER BY Edits DESC LIMIT 10;</code></p> |
| <pre><code class="hljs css language-bash">dsql> EXPLAIN PLAN FOR SELECT page, COUNT(*) AS Edits FROM wikipedia WHERE <span class="hljs-string">"__time"</span> BETWEEN TIMESTAMP <span class="hljs-string">'2015-09-12 00:00:00'</span> AND TIMESTAMP <span class="hljs-string">'2015-09-13 00:00:00'</span> GROUP BY page ORDER BY Edits DESC LIMIT 10; |
| ┌─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐ |
| │ PLAN │ |
| ├─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┤ |
| │ DruidQueryRel(query=[{<span class="hljs-string">"queryType"</span>:<span class="hljs-string">"topN"</span>,<span class="hljs-string">"dataSource"</span>:{<span class="hljs-string">"type"</span>:<span class="hljs-string">"table"</span>,<span class="hljs-string">"name"</span>:<span class="hljs-string">"wikipedia"</span>},<span class="hljs-string">"virtualColumns"</span>:[],<span class="hljs-string">"dimension"</span>:{<span class="hljs-string">"type"</span>:<span class="hljs-string">"default"</span>,<span class="hljs-string">"dimension"</span>:<span class="hljs-string">"page"</span>,<span class="hljs-string">"outputName"</span>:<span class="hljs-string">"d0"</span>,<span class="hljs-string">"outputType"</span>:<span class="hljs-string">"STRING"</span>},<span class="hljs-string">"metric"</span>:{<span class="hljs-string">"type"</span>:<span class="hljs-string">"numeric"</span>,<span class="hljs-string">"metric"</span>:<span class="hljs-string">"a0"</span>},<span class="hljs-string">"threshold"</span>:10,<span class="hljs-string">"intervals"</span>:{<span class="hljs-string">"type"</span>:<span class="hljs-string">"intervals"</span>,<span class="hljs-string">"intervals"</span>:[<span class="hljs-string">"2015-09-12T00:00:00.000Z/2015-09-13T00:00:00.001Z"</span>]},<span class="hljs-string">"filter"</span>:null,<span class="hljs-string">"granularity"</span>:{<span class="hljs-string">"type"</span>:<span class="hljs-string">"all"</span>},<span class="hljs-string">"aggregations"</span>:[{<span class="hljs-string">"type"</span>:<span class="hljs-string">"count"</span>,<span class="hljs-string">"name"</span>:<span class="hljs-string">"a0"</span>}],<span class="hljs-string">"postAggregations"</span>:[],<span class="hljs-string">"context"</span>:{},<span class="hljs-string">"descending"</span>:<span class="hljs-literal">false</span>}], signature=[{d0:STRING, a0:LONG}]) │ |
| └─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘ |
| Retrieved 1 row <span class="hljs-keyword">in</span> 0.03s. |
| </code></pre> |
| <h2><a class="anchor" aria-hidden="true" id="native-json-queries"></a><a href="#native-json-queries" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Native JSON queries</h2> |
| <p>Druid's native query format is expressed in JSON.</p> |
| <h3><a class="anchor" aria-hidden="true" id="native-query-via-the-console"></a><a href="#native-query-via-the-console" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Native query via the console</h3> |
| <p>You can issue native Druid queries from the console's Query view.</p> |
| <p>Here is a query that retrieves the 10 Wikipedia pages with the most page edits on 2015-09-12.</p> |
| <pre><code class="hljs css language-json">{ |
| <span class="hljs-attr">"queryType"</span> : <span class="hljs-string">"topN"</span>, |
| <span class="hljs-attr">"dataSource"</span> : <span class="hljs-string">"wikipedia"</span>, |
| <span class="hljs-attr">"intervals"</span> : [<span class="hljs-string">"2015-09-12/2015-09-13"</span>], |
| <span class="hljs-attr">"granularity"</span> : <span class="hljs-string">"all"</span>, |
| <span class="hljs-attr">"dimension"</span> : <span class="hljs-string">"page"</span>, |
| <span class="hljs-attr">"metric"</span> : <span class="hljs-string">"count"</span>, |
| <span class="hljs-attr">"threshold"</span> : <span class="hljs-number">10</span>, |
| <span class="hljs-attr">"aggregations"</span> : [ |
| { |
| <span class="hljs-attr">"type"</span> : <span class="hljs-string">"count"</span>, |
| <span class="hljs-attr">"name"</span> : <span class="hljs-string">"count"</span> |
| } |
| ] |
| } |
| </code></pre> |
| <p>Simply paste it into the console to switch the editor into JSON mode.</p> |
| <p><img src="../assets/tutorial-query-07.png" alt="Native query" title="Native query"></p> |
| <h3><a class="anchor" aria-hidden="true" id="native-queries-over-http"></a><a href="#native-queries-over-http" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Native queries over HTTP</h3> |
| <p>We have included a sample native TopN query under <code>quickstart/tutorial/wikipedia-top-pages.json</code>:</p> |
| <p>Let's submit this query to Druid:</p> |
| <pre><code class="hljs css language-bash">curl -X <span class="hljs-string">'POST'</span> -H <span class="hljs-string">'Content-Type:application/json'</span> -d @quickstart/tutorial/wikipedia-top-pages.json http://localhost:8888/druid/v2?pretty |
| </code></pre> |
| <p>You should see the following query results:</p> |
| <pre><code class="hljs css language-json">[ { |
| <span class="hljs-attr">"timestamp"</span> : <span class="hljs-string">"2015-09-12T00:46:58.771Z"</span>, |
| <span class="hljs-attr">"result"</span> : [ { |
| <span class="hljs-attr">"count"</span> : <span class="hljs-number">33</span>, |
| <span class="hljs-attr">"page"</span> : <span class="hljs-string">"Wikipedia:Vandalismusmeldung"</span> |
| }, { |
| <span class="hljs-attr">"count"</span> : <span class="hljs-number">28</span>, |
| <span class="hljs-attr">"page"</span> : <span class="hljs-string">"User:Cyde/List of candidates for speedy deletion/Subpage"</span> |
| }, { |
| <span class="hljs-attr">"count"</span> : <span class="hljs-number">27</span>, |
| <span class="hljs-attr">"page"</span> : <span class="hljs-string">"Jeremy Corbyn"</span> |
| }, { |
| <span class="hljs-attr">"count"</span> : <span class="hljs-number">21</span>, |
| <span class="hljs-attr">"page"</span> : <span class="hljs-string">"Wikipedia:Administrators' noticeboard/Incidents"</span> |
| }, { |
| <span class="hljs-attr">"count"</span> : <span class="hljs-number">20</span>, |
| <span class="hljs-attr">"page"</span> : <span class="hljs-string">"Flavia Pennetta"</span> |
| }, { |
| <span class="hljs-attr">"count"</span> : <span class="hljs-number">18</span>, |
| <span class="hljs-attr">"page"</span> : <span class="hljs-string">"Total Drama Presents: The Ridonculous Race"</span> |
| }, { |
| <span class="hljs-attr">"count"</span> : <span class="hljs-number">18</span>, |
| <span class="hljs-attr">"page"</span> : <span class="hljs-string">"User talk:Dudeperson176123"</span> |
| }, { |
| <span class="hljs-attr">"count"</span> : <span class="hljs-number">18</span>, |
| <span class="hljs-attr">"page"</span> : <span class="hljs-string">"Wikipédia:Le Bistro/12 septembre 2015"</span> |
| }, { |
| <span class="hljs-attr">"count"</span> : <span class="hljs-number">17</span>, |
| <span class="hljs-attr">"page"</span> : <span class="hljs-string">"Wikipedia:In the news/Candidates"</span> |
| }, { |
| <span class="hljs-attr">"count"</span> : <span class="hljs-number">17</span>, |
| <span class="hljs-attr">"page"</span> : <span class="hljs-string">"Wikipedia:Requests for page protection"</span> |
| } ] |
| } ] |
| </code></pre> |
| <h2><a class="anchor" aria-hidden="true" id="further-reading"></a><a href="#further-reading" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Further reading</h2> |
| <p>The <a href="/docs/0.18.1/querying/querying.html">Queries documentation</a> has more information on Druid's native JSON queries.</p> |
| <p>The <a href="/docs/0.18.1/querying/sql.html">Druid SQL documentation</a> has more information on using Druid SQL queries.</p> |
| </span></div></article></div><div class="docs-prevnext"><a class="docs-prev button" href="/docs/0.18.1/tutorials/tutorial-batch-hadoop.html"><span class="arrow-prev">← </span><span>Load from Apache Hadoop</span></a><a class="docs-next button" href="/docs/0.18.1/tutorials/tutorial-rollup.html"><span>Roll-up</span><span class="arrow-next"> →</span></a></div></div></div><nav class="onPageNav"><ul class="toc-headings"><li><a href="#druid-sql-queries">Druid SQL queries</a><ul class="toc-headings"><li><a href="#query-sql-via-the-console">Query SQL via the console</a></li><li><a href="#query-sql-via-dsql">Query SQL via dsql</a></li><li><a href="#query-sql-over-http">Query SQL over HTTP</a></li><li><a href="#more-druid-sql-examples">More Druid SQL examples</a></li><li><a href="#explain-query-plan">Explain query plan</a></li></ul></li><li><a href="#native-json-queries">Native JSON queries</a><ul class="toc-headings"><li><a href="#native-query-via-the-console">Native query via the console</a></li><li><a href="#native-queries-over-http">Native queries over HTTP</a></li></ul></li><li><a href="#further-reading">Further reading</a></li></ul></nav></div><footer class="nav-footer druid-footer" id="footer"><div class="container"><div class="text-center"><p><a href="/technology">Technology</a> · <a href="/use-cases">Use Cases</a> · <a href="/druid-powered">Powered by Druid</a> · <a href="/docs/0.18.1/">Docs</a> · <a href="/community/">Community</a> · <a href="/downloads.html">Download</a> · <a href="/faq">FAQ</a></p></div><div class="text-center"><a title="Join the user group" href="https://groups.google.com/forum/#!forum/druid-user" target="_blank"><span class="fa fa-comments"></span></a> · <a title="Follow Druid" href="https://twitter.com/druidio" target="_blank"><span class="fab fa-twitter"></span></a> · <a title="Download via Apache" href="https://www.apache.org/dyn/closer.cgi?path=/incubator/druid/{{ site.druid_versions[0].versions[0].version }}/apache-druid-{{ site.druid_versions[0].versions[0].version }}-bin.tar.gz" target="_blank"><span class="fas fa-feather"></span></a> · <a title="GitHub" href="https://github.com/apache/druid" target="_blank"><span class="fab fa-github"></span></a></div><div class="text-center license">Copyright © 2019 <a href="https://www.apache.org/" target="_blank">Apache Software Foundation</a>.<br/>Except where otherwise noted, licensed under <a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0</a>.<br/>Apache Druid, Druid, and the Druid logo are either registered trademarks or trademarks of The Apache Software Foundation in the United States and other countries.</div></div></footer></div><script type="text/javascript" src="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.js"></script><script> |
| document.addEventListener('keyup', function(e) { |
| if (e.target !== document.body) { |
| return; |
| } |
| // keyCode for '/' (slash) |
| if (e.keyCode === 191) { |
| const search = document.getElementById('search_input_react'); |
| search && search.focus(); |
| } |
| }); |
| </script><script> |
| var search = docsearch({ |
| |
| apiKey: '2de99082a9f38e49dfaa059bbe4c901d', |
| indexName: 'apache_druid', |
| inputSelector: '#search_input_react', |
| algoliaOptions: {"facetFilters":["language:en","version:0.18.1"]} |
| }); |
| </script></body></html> |