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

<p>SQL functions for encoding categorical variables to numerical values.  
<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:ab508855c762d04c77e993e30d655995e"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="encode__categorical_8sql__in.html#ab508855c762d04c77e993e30d655995e">encode_categorical_variables</a> (varchar source_table, varchar output_table, varchar categorical_cols, varchar categorical_cols_to_exclude, varchar row_id, varchar top, varchar value_to_drop, boolean encode_null, varchar output_type, boolean output_dictionary, varchar distributed_by)</td></tr>
<tr class="memdesc:ab508855c762d04c77e993e30d655995e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Encode categorical columns using either one-hot encoding or dummy coding.  <a href="#ab508855c762d04c77e993e30d655995e">More...</a><br /></td></tr>
<tr class="separator:ab508855c762d04c77e993e30d655995e"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a6685fbb11c4f68a25c232a6035c752c4"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="encode__categorical_8sql__in.html#a6685fbb11c4f68a25c232a6035c752c4">encode_categorical_variables</a> (varchar source_table, varchar output_table, varchar categorical_cols, varchar categorical_cols_to_exclude, varchar row_id, varchar top, varchar value_to_drop, boolean encode_null, varchar output_type, boolean output_dictionary)</td></tr>
<tr class="separator:a6685fbb11c4f68a25c232a6035c752c4"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a5ea1ae2dc53c77b047cd1dc186739bc7"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="encode__categorical_8sql__in.html#a5ea1ae2dc53c77b047cd1dc186739bc7">encode_categorical_variables</a> (varchar source_table, varchar output_table, varchar categorical_cols, varchar categorical_cols_to_exclude, varchar row_id, varchar top, varchar value_to_drop, boolean encode_null, varchar output_type)</td></tr>
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<tr class="separator:a63e256d5d0aefbcf29d74669276bdf20"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ab26bb9de11a426fd1cff17dce24ba98d"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="encode__categorical_8sql__in.html#ab26bb9de11a426fd1cff17dce24ba98d">encode_categorical_variables</a> (varchar source_table, varchar output_table, varchar categorical_cols, varchar categorical_cols_to_exclude, varchar row_id, varchar top, varchar value_to_drop)</td></tr>
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<tr class="memitem:a4a5f5774f0b6aad31427a47064565c82"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="encode__categorical_8sql__in.html#a4a5f5774f0b6aad31427a47064565c82">encode_categorical_variables</a> (varchar source_table, varchar output_table, varchar categorical_cols, varchar categorical_cols_to_exclude, varchar row_id, varchar top)</td></tr>
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<tr class="memitem:ab5c44316240bb072316870e43ff2d715"><td class="memItemLeft" align="right" valign="top">varchar&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="encode__categorical_8sql__in.html#ab5c44316240bb072316870e43ff2d715">encode_categorical_variables</a> (varchar message)</td></tr>
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</table>
<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>Dec 2016</dd></dl>
<dl class="section see"><dt>See also</dt><dd>Encodes categorical variables to numerical values </dd></dl>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="ab508855c762d04c77e993e30d655995e"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ab508855c762d04c77e993e30d655995e">&#9670;&nbsp;</a></span>encode_categorical_variables() <span class="overload">[1/11]</span></h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">void encode_categorical_variables </td>
          <td>(</td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>source_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>output_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>categorical_cols</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>categorical_cols_to_exclude</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>row_id</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>top</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>value_to_drop</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">boolean&#160;</td>
          <td class="paramname"><em>encode_null</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>output_type</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">boolean&#160;</td>
          <td class="paramname"><em>output_dictionary</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>distributed_by</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">source_table</td><td>Name of table containing categorical variable </td></tr>
    <tr><td class="paramname">output_table</td><td>Name of table to output dummy variables </td></tr>
    <tr><td class="paramname">categorical_cols</td><td>Comma-separated list of column names to dummy code (can be '*') </td></tr>
    <tr><td class="paramname">categorical_cols_to_exclude</td><td>Comma-separated list of column names to exclude (if categorical_cols = '*') </td></tr>
    <tr><td class="paramname">row_id</td><td>Columns from source table to index output table </td></tr>
    <tr><td class="paramname">top</td><td>Parameter to include only top values of a categorical variable </td></tr>
    <tr><td class="paramname">value_to_drop</td><td>Parameter to set reference column in dummy coding </td></tr>
    <tr><td class="paramname">encode_null</td><td>Boolean to determine the behavior for rows with NULL value </td></tr>
    <tr><td class="paramname">output_type</td><td>Parameter to set output data type: 'column', 'array' or 'svec' </td></tr>
    <tr><td class="paramname">output_dictionary</td><td>Boolean to simplify column naming and with a separate mapping table to actual values </td></tr>
    <tr><td class="paramname">distributed_by</td><td>Comma-separated list of column names to use for distribution of output</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Void </dd></dl>

</div>
</div>
<a id="a6685fbb11c4f68a25c232a6035c752c4"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a6685fbb11c4f68a25c232a6035c752c4">&#9670;&nbsp;</a></span>encode_categorical_variables() <span class="overload">[2/11]</span></h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">void encode_categorical_variables </td>
          <td>(</td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>source_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>output_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>categorical_cols</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>categorical_cols_to_exclude</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>row_id</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>top</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>value_to_drop</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">boolean&#160;</td>
          <td class="paramname"><em>encode_null</em>, </td>
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        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>output_type</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">boolean&#160;</td>
          <td class="paramname"><em>output_dictionary</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
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</div><div class="memdoc">

</div>
</div>
<a id="a5ea1ae2dc53c77b047cd1dc186739bc7"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a5ea1ae2dc53c77b047cd1dc186739bc7">&#9670;&nbsp;</a></span>encode_categorical_variables() <span class="overload">[3/11]</span></h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">void encode_categorical_variables </td>
          <td>(</td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>source_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>output_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>categorical_cols</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>categorical_cols_to_exclude</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>row_id</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>top</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>value_to_drop</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">boolean&#160;</td>
          <td class="paramname"><em>encode_null</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>output_type</em>&#160;</td>
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        <tr>
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          <td>)</td>
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</div><div class="memdoc">

</div>
</div>
<a id="a63e256d5d0aefbcf29d74669276bdf20"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a63e256d5d0aefbcf29d74669276bdf20">&#9670;&nbsp;</a></span>encode_categorical_variables() <span class="overload">[4/11]</span></h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">void encode_categorical_variables </td>
          <td>(</td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>source_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>output_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>categorical_cols</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>categorical_cols_to_exclude</em>, </td>
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        <tr>
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<a id="ab26bb9de11a426fd1cff17dce24ba98d"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ab26bb9de11a426fd1cff17dce24ba98d">&#9670;&nbsp;</a></span>encode_categorical_variables() <span class="overload">[5/11]</span></h2>

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          <td class="memname">void encode_categorical_variables </td>
          <td>(</td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>source_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>output_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>categorical_cols</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>categorical_cols_to_exclude</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>row_id</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>top</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>value_to_drop</em>&#160;</td>
        </tr>
        <tr>
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<a id="a4a5f5774f0b6aad31427a47064565c82"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a4a5f5774f0b6aad31427a47064565c82">&#9670;&nbsp;</a></span>encode_categorical_variables() <span class="overload">[6/11]</span></h2>

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          <td class="memname">void encode_categorical_variables </td>
          <td>(</td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>source_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>output_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>categorical_cols</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>categorical_cols_to_exclude</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>row_id</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>top</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
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<a id="a31753df1ea819930436ab2d10b996599"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a31753df1ea819930436ab2d10b996599">&#9670;&nbsp;</a></span>encode_categorical_variables() <span class="overload">[7/11]</span></h2>

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          <td class="memname">void encode_categorical_variables </td>
          <td>(</td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>source_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>output_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>categorical_cols</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>categorical_cols_to_exclude</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>row_id</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

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<a id="a1f60121c4552a526513561281bf371f3"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a1f60121c4552a526513561281bf371f3">&#9670;&nbsp;</a></span>encode_categorical_variables() <span class="overload">[8/11]</span></h2>

<div class="memitem">
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          <td class="memname">void encode_categorical_variables </td>
          <td>(</td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>source_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>output_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>categorical_cols</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>categorical_cols_to_exclude</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

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<a id="a6a92afff73eb09fa0b7db489bd009235"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a6a92afff73eb09fa0b7db489bd009235">&#9670;&nbsp;</a></span>encode_categorical_variables() <span class="overload">[9/11]</span></h2>

<div class="memitem">
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          <td class="memname">void encode_categorical_variables </td>
          <td>(</td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>source_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>output_table</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>categorical_cols</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

</div>
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<a id="ab5c44316240bb072316870e43ff2d715"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ab5c44316240bb072316870e43ff2d715">&#9670;&nbsp;</a></span>encode_categorical_variables() <span class="overload">[10/11]</span></h2>

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          <td class="memname">varchar encode_categorical_variables </td>
          <td>(</td>
          <td class="paramtype">varchar&#160;</td>
          <td class="paramname"><em>message</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
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<h2 class="memtitle"><span class="permalink"><a href="#a8fea222d67f69c73255dbdee2746bed5">&#9670;&nbsp;</a></span>encode_categorical_variables() <span class="overload">[11/11]</span></h2>

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          <td class="memname">varchar encode_categorical_variables </td>
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