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Su, Xiaomeng
76a5b1ee83
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com> Co-authored-by: Su, Xiaomeng <suxiaomeng1@huawei.com> Co-committed-by: Su, Xiaomeng <suxiaomeng1@huawei.com>
54 lines
5.0 KiB
HTML
54 lines
5.0 KiB
HTML
<a name="dli_spark_sum"></a><a name="dli_spark_sum"></a>
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<h1 class="topictitle1">sum</h1>
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<div id="body8662426"><p id="dli_spark_sum__en-us_topic_0000001655381150_p18471163815215">This function is used to calculate the total sum.</p>
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<div class="section" id="dli_spark_sum__en-us_topic_0000001655381150_section45291954203217"><h4 class="sectiontitle">Syntax</h4><pre class="screen" id="dli_spark_sum__en-us_topic_0000001655381150_screen19928459112517">sum(col),
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sum(DISTINCT col)</pre>
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</div>
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<div class="section" id="dli_spark_sum__en-us_topic_0000001655381150_section992014913317"><h4 class="sectiontitle">Parameters</h4>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="dli_spark_sum__en-us_topic_0000001655381150_table1829154762513" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Parameter</caption><thead align="left"><tr id="dli_spark_sum__en-us_topic_0000001655381150_row8830104792517"><th align="left" class="cellrowborder" valign="top" width="22.759999999999998%" id="mcps1.3.3.2.2.4.1.1"><p id="dli_spark_sum__en-us_topic_0000001655381150_p983074711252">Parameter</p>
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</th>
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<th align="left" class="cellrowborder" valign="top" width="15.920000000000002%" id="mcps1.3.3.2.2.4.1.2"><p id="dli_spark_sum__en-us_topic_0000001655381150_p6830124732517">Mandatory</p>
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</th>
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<th align="left" class="cellrowborder" valign="top" width="61.31999999999999%" id="mcps1.3.3.2.2.4.1.3"><p id="dli_spark_sum__en-us_topic_0000001655381150_p08301547132513">Description</p>
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</th>
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</tr>
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</thead>
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<tbody><tr id="dli_spark_sum__en-us_topic_0000001655381150_row15830184792511"><td class="cellrowborder" valign="top" width="22.759999999999998%" headers="mcps1.3.3.2.2.4.1.1 "><p id="dli_spark_sum__en-us_topic_0000001655381150_p683034714250">col</p>
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</td>
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<td class="cellrowborder" valign="top" width="15.920000000000002%" headers="mcps1.3.3.2.2.4.1.2 "><p id="dli_spark_sum__en-us_topic_0000001655381150_p12830184752518">Yes</p>
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</td>
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<td class="cellrowborder" valign="top" width="61.31999999999999%" headers="mcps1.3.3.2.2.4.1.3 "><p id="dli_spark_sum__en-us_topic_0000001655381150_p7506311155115">The value can be of any data type and can be converted to the DOUBLE type for calculation.</p>
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<p id="dli_spark_sum__en-us_topic_0000001655381150_p1118714144513">The value can be of the DOUBLE, DECIMAL, or BIGINT type.</p>
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<p id="dli_spark_sum__en-us_topic_0000001655381150_p9484232112711">If the value is of the STRING type, the system implicitly converts it to DOUBLE for calculation.</p>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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<div class="section" id="dli_spark_sum__en-us_topic_0000001655381150_section210162513312"><h4 class="sectiontitle">Return Values</h4><p id="dli_spark_sum__en-us_topic_0000001655381150_p184124317231">The return value is of the DOUBLE type.</p>
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<div class="note" id="dli_spark_sum__en-us_topic_0000001655381150_note61422099395"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="dli_spark_sum__en-us_topic_0000001655381150_p11468110152814">If the value of <strong id="dli_spark_sum__en-us_topic_0000001655381150_b564361882336">col</strong> is <strong id="dli_spark_sum__en-us_topic_0000001655381150_b2045711964336">NULL</strong>, the row is not involved in calculation.</p>
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</div></div>
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</div>
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<div class="section" id="dli_spark_sum__en-us_topic_0000001655381150_section13277192233920"><h4 class="sectiontitle">Example Code</h4><ul id="dli_spark_sum__en-us_topic_0000001655381150_ul159701533389"><li id="dli_spark_sum__en-us_topic_0000001655381150_li1197035313384">Calculates the total number of offerings (items) in all warehouses. An example command is as follows:<pre class="screen" id="dli_spark_sum__en-us_topic_0000001655381150_screen4884136174710">select sum(items) from warehouse;</pre>
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<p id="dli_spark_sum__en-us_topic_0000001655381150_p191041432184717">The command output is as follows:</p>
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<pre class="screen" id="dli_spark_sum__en-us_topic_0000001655381150_screen634105384713">_c0
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55357 </pre>
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</li><li id="dli_spark_sum__en-us_topic_0000001655381150_li115433493911">When used with <strong id="dli_spark_sum__en-us_topic_0000001655381150_b42353192912">group by</strong>, it groups all offerings by warehouse (warehouseId) and calculates the total number of offerings in all warehouses. An example command is as follows:<pre class="screen" id="dli_spark_sum__en-us_topic_0000001655381150_screen16999128134816">select warehouseId, sum(items) from warehouse group by warehouseId;</pre>
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<p id="dli_spark_sum__en-us_topic_0000001655381150_p11257183294716">The command output is as follows:</p>
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<pre class="screen" id="dli_spark_sum__en-us_topic_0000001655381150_screen18176142314816">warehouseId| _c1
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city1 15500
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city2 10175
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city3 19400 </pre>
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</li></ul>
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<p id="dli_spark_sum__en-us_topic_0000001655381150_p1633614320474"></p>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="dli_08_0474.html">Aggregate Functions</a></div>
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</div>
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</div>
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