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<title>DATE_TRUNC Function - SQL Notebook</title>
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<h1><code>DATE_TRUNC</code> Function</h1>
  <p>Returns a new date by finding the nearest specified calendar or clock division prior to the specified source
  date.</p>
  <h2>Syntax<br></h2><tt>DATE_TRUNC(<i>date-part</i>, <i>date</i>)</tt><br>
  <h2>Parameters</h2>
  <ul class="args">
    <li>
      <i>date-part</i>: text<br>
      One of the following predefined strings:
      <ul class="enum">
        <li><code>year</code>, <code>yy</code>, <code>yyyy</code></li>
        <li><code>quarter</code>, <code>qq</code>, <code>q</code></li>
        <li><code>month</code>, <code>mm</code>, <code>m</code></li>
        <li><code>dayofyear</code>, <code>dy</code>, <code>y</code></li>
        <li><code>day</code>, <code>dd</code>, <code>d</code></li>
        <li><code>week</code>, <code>wk</code>, <code>ww</code></li>
        <li><code>weekday</code>, <code>dw</code></li>
        <li><code>hour</code>, <code>hh</code></li>
        <li><code>minute</code>, <code>mi</code>, <code>n</code></li>
        <li><code>second</code>, <code>ss</code>, <code>s</code></li>
        <li><code>millisecond</code>, <code>ms</code></li>
      </ul>
    </li>
    <li><i>date</i>: text<br>
    A text value that can be parsed into a date/time.</li>
  </ul>
  <h2>Return Value<br></h2>A string like "2016-07-23 21:00:00.000 -04:00", calculated by finding the nearest specified
  time division prior to the specified&nbsp;<i>date</i>.<br>
  <h2>Example</h2>
  <pre><i>-- Prints "2016-07-01 00:00:00.000".</i><br>PRINT DATE_TRUNC('month', '2016-07-23 12:23:00');<br><br><i>-- Prints "2015-08-02 00:00:00.000".</i>
PRINT DATE_TRUNC('week', '2015-08-03 12:41:25');<br><br><i>-- Prints "2015-02-03 12:00:00.000".</i><br>PRINT DATE_TRUNC('hh', '2015-02-03 12:41:25');<br></pre>
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