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<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>Tutorial: Load files with SQL-based ingestion · Apache Druid</title><meta name="viewport" content="width=device-width, initial-scale=1.0"/><link rel="canonical" href="https://druid.apache.org/docs/26.0.0/tutorials/tutorial-msq-extern.html"/><meta name="generator" content="Docusaurus"/><meta name="description" content="How to generate a query that references externally hosted data"/><meta name="docsearch:language" content="en"/><meta name="docsearch:version" content="26.0.0" /><meta property="og:title" content="Tutorial: Load files with SQL-based ingestion · Apache Druid"/><meta property="og:type" content="website"/><meta property="og:url" content="https://druid.apache.org/index.html"/><meta property="og:description" content="How to generate a query that references externally hosted data"/><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/npm/docsearch.js@2/dist/cdn/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>
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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/26.0.0/design/index.html">Introduction to Apache Druid</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/tutorials/index.html">Quickstart (local)</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/operations/single-server.html">Single server deployment</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/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/26.0.0/tutorials/tutorial-batch.html">Load files natively</a></li><li class="navListItem navListItemActive"><a class="navItem" href="/docs/26.0.0/tutorials/tutorial-msq-extern.html">Load files using SQL 🆕</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/tutorials/tutorial-kafka.html">Load from Apache Kafka</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/tutorials/tutorial-batch-hadoop.html">Load from Apache Hadoop</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/tutorials/tutorial-query.html">Querying data</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/tutorials/tutorial-rollup.html">Roll-up</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/tutorials/tutorial-sketches-theta.html">Theta sketches</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/tutorials/tutorial-retention.html">Configuring data retention</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/tutorials/tutorial-update-data.html">Updating existing data</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/tutorials/tutorial-compaction.html">Compacting segments</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/tutorials/tutorial-delete-data.html">Deleting data</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/tutorials/tutorial-ingestion-spec.html">Writing an ingestion spec</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/tutorials/tutorial-transform-spec.html">Transforming input data</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/tutorials/docker.html">Tutorial: Run with Docker</a></li><li class="navListItem"><a class="navItem" 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href="/docs/26.0.0/data-management/delete.html">Data deletion</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/data-management/schema-changes.html">Schema changes</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/data-management/compaction.html">Compaction</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/data-management/automatic-compaction.html">Automatic compaction</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"><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Druid SQL</h4><ul><li class="navListItem"><a class="navItem" href="/docs/26.0.0/querying/sql.html">Overview and syntax</a></li><li class="navListItem"><a class="navItem" 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class="navItem" href="/docs/26.0.0/querying/timeseriesquery.html">Timeseries</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/querying/topnquery.html">TopN</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/querying/groupbyquery.html">GroupBy</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/querying/scan-query.html">Scan</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/querying/searchquery.html">Search</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/querying/timeboundaryquery.html">TimeBoundary</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/querying/segmentmetadataquery.html">SegmentMetadata</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/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/26.0.0/querying/filters.html">Filters</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/querying/granularities.html">Granularities</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/querying/dimensionspecs.html">Dimensions</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/querying/aggregations.html">Aggregations</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/querying/post-aggregations.html">Post-aggregations</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/misc/math-expr.html">Expressions</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/querying/having.html">Having filters (groupBy)</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/querying/limitspec.html">Sorting and limiting (groupBy)</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/querying/topnmetricspec.html">Sorting (topN)</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/querying/sorting-orders.html">String comparators</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/querying/virtual-columns.html">Virtual columns</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/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/26.0.0/configuration/index.html">Configuration reference</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/development/extensions.html">Extensions</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/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/26.0.0/operations/web-console.html">Web console</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/operations/java.html">Java runtime</a></li><div class="navGroup subNavGroup"><h4 class="navGroupSubcategoryTitle">Security</h4><ul><li class="navListItem"><a class="navItem" href="/docs/26.0.0/operations/security-overview.html">Security overview</a></li><li class="navListItem"><a class="navItem" href="/docs/26.0.0/operations/security-user-auth.html">User authentication and authorization</a></li><li class="navListItem"><a class="navItem" 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<blockquote>
<p>This page describes SQL-based batch ingestion using the <a href="/docs/26.0.0/multi-stage-query/index.html"><code>druid-multi-stage-query</code></a>
extension, new in Druid 24.0. Refer to the <a href="/docs/26.0.0/ingestion/index.html#batch">ingestion methods</a> table to determine which
ingestion method is right for you.</p>
</blockquote>
<p>This tutorial demonstrates how to generate a query that references externally hosted data using the <strong>Connect external data</strong> wizard.</p>
<p>The following example uses EXTERN to query a JSON file located at <a href="https://druid.apache.org/data/wikipedia.json.gz">https://druid.apache.org/data/wikipedia.json.gz</a>.</p>
<p>Although you can manually create a query in the UI, you can use Druid to generate a base query for you that you can modify to meet your requirements.</p>
<p>To generate a query from external data, do the following:</p>
<ol>
<li><p>In the <strong>Query</strong> view of the web console, click <strong>Connect external data</strong>.</p></li>
<li><p>On the <strong>Select input type</strong> screen, choose <strong>HTTP(s)</strong> and enter the following value in the <strong>URIs</strong> field: <code>https://druid.apache.org/data/wikipedia.json.gz</code>. Leave the HTTP auth username and password blank.</p></li>
<li><p>Click <strong>Connect data</strong>.</p></li>
<li><p>On the <strong>Parse</strong> screen, you can perform additional actions before you load the data into Druid:</p>
<ul>
<li>Expand a row to see what data it corresponds to from the source.</li>
<li>Customize how Druid handles the data by selecting the <strong>Input format</strong> and its related options, such as adding <strong>JSON parser features</strong> for JSON files.</li>
</ul></li>
<li><p>When you're ready, click <strong>Done</strong>. You're returned to the <strong>Query</strong> view where you can see the starter query that will insert the data from the external source into a table named <code>wikipedia</code>.</p>
<p><details><summary>Show the query</summary></p>
<pre><code class="hljs css language-sql"><span class="hljs-keyword">REPLACE</span> <span class="hljs-keyword">INTO</span> <span class="hljs-string">"wikipedia"</span> OVERWRITE <span class="hljs-keyword">ALL</span>
<span class="hljs-keyword">WITH</span> ext <span class="hljs-keyword">AS</span> (<span class="hljs-keyword">SELECT</span> *
<span class="hljs-keyword">FROM</span> <span class="hljs-keyword">TABLE</span>(
EXTERN(
<span class="hljs-string">'{"type":"http","uris":["https://druid.apache.org/data/wikipedia.json.gz"]}'</span>,
<span class="hljs-string">'{"type":"json"}'</span>,
<span class="hljs-string">'[{"name":"isRobot","type":"string"},{"name":"channel","type":"string"},{"name":"timestamp","type":"string"},{"name":"flags","type":"string"},{"name":"isUnpatrolled","type":"string"},{"name":"page","type":"string"},{"name":"diffUrl","type":"string"},{"name":"added","type":"long"},{"name":"comment","type":"string"},{"name":"commentLength","type":"long"},{"name":"isNew","type":"string"},{"name":"isMinor","type":"string"},{"name":"delta","type":"long"},{"name":"isAnonymous","type":"string"},{"name":"user","type":"string"},{"name":"deltaBucket","type":"long"},{"name":"deleted","type":"long"},{"name":"namespace","type":"string"},{"name":"cityName","type":"string"},{"name":"countryName","type":"string"},{"name":"regionIsoCode","type":"string"},{"name":"metroCode","type":"long"},{"name":"countryIsoCode","type":"string"},{"name":"regionName","type":"string"}]'</span>
)
))
<span class="hljs-keyword">SELECT</span>
TIME_PARSE(<span class="hljs-string">"timestamp"</span>) <span class="hljs-keyword">AS</span> __time,
isRobot,
channel,
flags,
isUnpatrolled,
page,
diffUrl,
added,
<span class="hljs-keyword">comment</span>,
commentLength,
isNew,
isMinor,
delta,
isAnonymous,
<span class="hljs-keyword">user</span>,
deltaBucket,
deleted,
namespace,
cityName,
countryName,
regionIsoCode,
metroCode,
countryIsoCode,
regionName
<span class="hljs-keyword">FROM</span> ext
PARTITIONED <span class="hljs-keyword">BY</span> <span class="hljs-keyword">DAY</span>
</code></pre>
<p></details></p></li>
<li><p>Review and modify the query to meet your needs. For example, you can rename the table or change segment granularity. To partition by something other than ALL, include <code>TIME_PARSE(&quot;timestamp&quot;) AS __time</code> in your SELECT statement.</p>
<p>For example, to specify day-based segment granularity, change the partitioning to <code>PARTITIONED BY DAY</code>:</p>
<pre><code class="hljs css language-sql"> <span class="hljs-keyword">INSERT</span> <span class="hljs-keyword">INTO</span> ...
<span class="hljs-keyword">SELECT</span>
TIME_PARSE(<span class="hljs-string">"timestamp"</span>) <span class="hljs-keyword">AS</span> __time,
...
...
PARTITIONED <span class="hljs-keyword">BY</span> <span class="hljs-keyword">DAY</span>
</code></pre></li>
<li><p>Optionally, select <strong>Preview</strong> to review the data before you ingest it. A preview runs the query without the REPLACE INTO clause and with an added LIMIT.
You can see the general shape of the data before you commit to inserting it.
The LIMITs make the query run faster but can cause incomplete results.</p></li>
<li><p>Click <strong>Run</strong> to launch your query. The query returns information including its duration and the number of rows inserted into the table.</p></li>
</ol>
<h2><a class="anchor" aria-hidden="true" id="query-the-data"></a><a href="#query-the-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>Query the data</h2>
<p>You can query the <code>wikipedia</code> table after the ingestion completes.
For example, you can analyze the data in the table to produce a list of top channels:</p>
<pre><code class="hljs css language-sql"><span class="hljs-keyword">SELECT</span>
channel,
<span class="hljs-keyword">COUNT</span>(*)
<span class="hljs-keyword">FROM</span> <span class="hljs-string">"wikipedia"</span>
<span class="hljs-keyword">GROUP</span> <span class="hljs-keyword">BY</span> channel
<span class="hljs-keyword">ORDER</span> <span class="hljs-keyword">BY</span> <span class="hljs-keyword">COUNT</span>(*) <span class="hljs-keyword">DESC</span>
</code></pre>
<p>With the EXTERN function, you could run the same query on the external data directly without ingesting it first:</p>
<p><details><summary>Show the query</summary></p>
<pre><code class="hljs css language-sql"><span class="hljs-keyword">SELECT</span>
channel,
<span class="hljs-keyword">COUNT</span>(*)
<span class="hljs-keyword">FROM</span> <span class="hljs-keyword">TABLE</span>(
EXTERN(
<span class="hljs-string">'{"type": "http", "uris": ["https://druid.apache.org/data/wikipedia.json.gz"]}'</span>,
<span class="hljs-string">'{"type": "json"}'</span>,
<span class="hljs-string">'[{"name": "added", "type": "long"}, {"name": "channel", "type": "string"}, {"name": "cityName", "type": "string"}, {"name": "comment", "type": "string"}, {"name": "commentLength", "type": "long"}, {"name": "countryIsoCode", "type": "string"}, {"name": "countryName", "type": "string"}, {"name": "deleted", "type": "long"}, {"name": "delta", "type": "long"}, {"name": "deltaBucket", "type": "string"}, {"name": "diffUrl", "type": "string"}, {"name": "flags", "type": "string"}, {"name": "isAnonymous", "type": "string"}, {"name": "isMinor", "type": "string"}, {"name": "isNew", "type": "string"}, {"name": "isRobot", "type": "string"}, {"name": "isUnpatrolled", "type": "string"}, {"name": "metroCode", "type": "string"}, {"name": "namespace", "type": "string"}, {"name": "page", "type": "string"}, {"name": "regionIsoCode", "type": "string"}, {"name": "regionName", "type": "string"}, {"name": "timestamp", "type": "string"}, {"name": "user", "type": "string"}]'</span>
)
)
<span class="hljs-keyword">GROUP</span> <span class="hljs-keyword">BY</span> channel
<span class="hljs-keyword">ORDER</span> <span class="hljs-keyword">BY</span> <span class="hljs-keyword">COUNT</span>(*) <span class="hljs-keyword">DESC</span>
</code></pre>
<p></details></p>
<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>See the following topics to learn more:</p>
<ul>
<li><a href="/docs/26.0.0/multi-stage-query/index.html">SQL-based ingestion overview</a> to further explore SQL-based ingestion.</li>
<li><a href="/docs/26.0.0/multi-stage-query/reference.html">SQL-based ingestion reference</a> for reference on context parameters, functions, and error codes.</li>
</ul>
</span></div></article></div><div class="docs-prevnext"><a class="docs-prev button" href="/docs/26.0.0/tutorials/tutorial-batch.html"><span class="arrow-prev">← </span><span>Load files natively</span></a><a class="docs-next button" href="/docs/26.0.0/tutorials/tutorial-kafka.html"><span>Load from Apache Kafka</span><span class="arrow-next"> →</span></a></div></div></div><nav class="onPageNav"><ul class="toc-headings"><li><a href="#query-the-data">Query the data</a></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/26.0.0/">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 © 2022 <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/npm/docsearch.js@2/dist/cdn/docsearch.min.js"></script><script>
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