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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: Querying data · Apache Druid</title><meta name="viewport" content="width=device-width"/><link rel="canonical" href="https://druid.apache.org/docs/0.16.1-incubating/tutorials/tutorial-query.html"/><meta name="generator" content="Docusaurus"/><meta name="description" content="&lt;!--"/><meta name="docsearch:language" content="en"/><meta name="docsearch:version" content="0.16.1-incubating" /><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="&lt;!--"/><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>
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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/0.16.1-incubating/design/index.html">Introduction to Apache Druid</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/tutorials/index.html">Quickstart</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/operations/single-server.html">Single server deployment</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/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 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class="navItem" href="/docs/0.16.1-incubating/tutorials/tutorial-update-data.html">Updating existing data</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/tutorials/tutorial-compaction.html">Compacting segments</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/tutorials/tutorial-delete-data.html">Deleting data</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/tutorials/tutorial-ingestion-spec.html">Writing an ingestion spec</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/tutorials/tutorial-transform-spec.html">Transforming input data</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/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" 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href="/docs/0.16.1-incubating/development/extensions-core/kinesis-ingestion.html">Amazon Kinesis</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/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/0.16.1-incubating/ingestion/native-batch.html">Native batch</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/ingestion/hadoop.html">Hadoop-based</a></li></ul></div><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/ingestion/tasks.html">Task reference</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/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" 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support</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/operations/password-provider.html">Password providers</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/operations/dump-segment.html">dump-segment tool</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/operations/reset-cluster.html">reset-cluster tool</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/operations/insert-segment-to-db.html">insert-segment-to-db tool</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/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/0.16.1-incubating/operations/deep-storage-migration.html">Deep storage migration</a></li><li class="navListItem"><a class="navItem" 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href="/docs/0.16.1-incubating/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/0.16.1-incubating/comparisons/druid-vs-kudu.html">Apache Druid vs Kudu</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/comparisons/druid-vs-redshift.html">Apache Druid vs Redshift</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/comparisons/druid-vs-spark.html">Apache Druid vs Spark</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/comparisons/druid-vs-sql-on-hadoop.html">Apache Druid vs SQL-on-Hadoop</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/design/auth.html">Authentication and Authorization</a></li><li class="navListItem"><a class="navItem" href="/docs/0.16.1-incubating/design/broker.html">Broker</a></li><li class="navListItem"><a class="navItem" 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<p>This tutorial will demonstrate how to query data in Apache Druid (incubating), 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/0.16.1-incubating/tutorials/tutorial-batch.html">Tutorial: Loading a file</a></li>
<li><a href="/docs/0.16.1-incubating/tutorials/tutorial-kafka.html">Tutorial: Loading stream data from Kafka</a></li>
<li><a href="/docs/0.16.1-incubating/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> &lt;= <span class="hljs-string">"__time"</span> <span class="hljs-keyword">AND</span> <span class="hljs-string">"__time"</span> &lt; <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/0.16.1-incubating/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&gt;
</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&gt; 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 &quot;__time&quot; 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&gt; 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/0.16.1-incubating/querying/querying.html">Queries documentation</a> has more information on Druid's native JSON queries.</p>
<p>The <a href="/docs/0.16.1-incubating/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/0.16.1-incubating/tutorials/tutorial-batch-hadoop.html"><span class="arrow-prev">← </span><span>Load from Apache Hadoop</span></a><a class="docs-next button" href="/docs/0.16.1-incubating/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/0.16.1-incubating/latest">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/incubator-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>
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