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<div class="header">
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<a href="#func-members">Functions</a>  </div>
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<div class="title">stratified_sample.sql_in File Reference</div>  </div>
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<div class="contents">

<p>SQL functions for stratified sampling.  
<a href="#details">More...</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:a44753db6b486f7e020740ead271a2420"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="stratified__sample_8sql__in.html#a44753db6b486f7e020740ead271a2420">stratified_sample</a> (text source_table, text output_table, float8 proportion, text grouping_cols, text target_cols, boolean with_replacement)</td></tr>
<tr class="separator:a44753db6b486f7e020740ead271a2420"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a9107baf0d8ea245273e06ae5c41d16aa"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="stratified__sample_8sql__in.html#a9107baf0d8ea245273e06ae5c41d16aa">stratified_sample</a> (text source_table, text output_table, float8 proportion, text grouping_cols, text target_cols)</td></tr>
<tr class="separator:a9107baf0d8ea245273e06ae5c41d16aa"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a5a09f753977051e3eb337f39680c3730"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="stratified__sample_8sql__in.html#a5a09f753977051e3eb337f39680c3730">stratified_sample</a> (text source_table, text output_table, float8 proportion, text grouping_cols)</td></tr>
<tr class="separator:a5a09f753977051e3eb337f39680c3730"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aadb9952a02cb0977b2fcead3445adde2"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="stratified__sample_8sql__in.html#aadb9952a02cb0977b2fcead3445adde2">stratified_sample</a> (text source_table, text output_table, float8 proportion)</td></tr>
<tr class="separator:aadb9952a02cb0977b2fcead3445adde2"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a489042579fb1e9b138a309584b57ca36"><td class="memItemLeft" align="right" valign="top">varchar&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="stratified__sample_8sql__in.html#a489042579fb1e9b138a309584b57ca36">stratified_sample</a> (varchar message)</td></tr>
<tr class="separator:a489042579fb1e9b138a309584b57ca36"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aa89c8ef2dbb59b4c84657b75572bf7ff"><td class="memItemLeft" align="right" valign="top">varchar&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="stratified__sample_8sql__in.html#aa89c8ef2dbb59b4c84657b75572bf7ff">stratified_sample</a> ()</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>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</p>
<p><a href="http://www.apache.org/licenses/LICENSE-2.0">http://www.apache.org/licenses/LICENSE-2.0</a></p>
<p>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>
<dl class="section date"><dt>Date</dt><dd>07/19/2017</dd></dl>
<dl class="section see"><dt>See also</dt><dd>Given a table, stratified sampling returns a proportion of records for each group (strata). </dd></dl>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="a44753db6b486f7e020740ead271a2420"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a44753db6b486f7e020740ead271a2420">&#9670;&nbsp;</a></span>stratified_sample() <span class="overload">[1/6]</span></h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">void stratified_sample </td>
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        </tr>
        <tr>
          <td class="paramkey"></td>
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          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>output_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8&#160;</td>
          <td class="paramname"><em>proportion</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>grouping_cols</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>target_cols</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">boolean&#160;</td>
          <td class="paramname"><em>with_replacement</em>&#160;</td>
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</div>
</div>
<a id="a9107baf0d8ea245273e06ae5c41d16aa"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a9107baf0d8ea245273e06ae5c41d16aa">&#9670;&nbsp;</a></span>stratified_sample() <span class="overload">[2/6]</span></h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">void stratified_sample </td>
          <td>(</td>
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          <td class="paramname"><em>source_table</em>, </td>
        </tr>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>output_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8&#160;</td>
          <td class="paramname"><em>proportion</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>grouping_cols</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>target_cols</em>&#160;</td>
        </tr>
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          <td>)</td>
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</div>
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<a id="a5a09f753977051e3eb337f39680c3730"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a5a09f753977051e3eb337f39680c3730">&#9670;&nbsp;</a></span>stratified_sample() <span class="overload">[3/6]</span></h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">void stratified_sample </td>
          <td>(</td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>source_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>output_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8&#160;</td>
          <td class="paramname"><em>proportion</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>grouping_cols</em>&#160;</td>
        </tr>
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</div><div class="memdoc">

</div>
</div>
<a id="aadb9952a02cb0977b2fcead3445adde2"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aadb9952a02cb0977b2fcead3445adde2">&#9670;&nbsp;</a></span>stratified_sample() <span class="overload">[4/6]</span></h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">void stratified_sample </td>
          <td>(</td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>source_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">text&#160;</td>
          <td class="paramname"><em>output_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">float8&#160;</td>
          <td class="paramname"><em>proportion</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

</div>
</div>
<a id="a489042579fb1e9b138a309584b57ca36"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a489042579fb1e9b138a309584b57ca36">&#9670;&nbsp;</a></span>stratified_sample() <span class="overload">[5/6]</span></h2>

<div class="memitem">
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      <table class="memname">
        <tr>
          <td class="memname">varchar stratified_sample </td>
          <td>(</td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>message</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
</div><div class="memdoc">

</div>
</div>
<a id="aa89c8ef2dbb59b4c84657b75572bf7ff"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aa89c8ef2dbb59b4c84657b75572bf7ff">&#9670;&nbsp;</a></span>stratified_sample() <span class="overload">[6/6]</span></h2>

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          <td class="memname">varchar stratified_sample </td>
          <td>(</td>
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