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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>
66 lines
9.7 KiB
HTML
66 lines
9.7 KiB
HTML
<a name="dli_spark_datepart"></a><a name="dli_spark_datepart"></a>
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<h1 class="topictitle1">datepart</h1>
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<div id="body8662426"><p id="dli_spark_datepart__en-us_topic_0000001645954790_p990811211817">This function is used to calculate the value that meets the specified <strong id="dli_spark_datepart__en-us_topic_0000001645954790_b1575319103395">datepart</strong> in <strong id="dli_spark_datepart__en-us_topic_0000001645954790_b1150451216399">date</strong>.</p>
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<div class="section" id="dli_spark_datepart__en-us_topic_0000001645954790_section45291954203217"><h4 class="sectiontitle">Syntax</h4><pre class="screen" id="dli_spark_datepart__en-us_topic_0000001645954790_screen2121185651218">datepart (string date, string datepart)</pre>
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</div>
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<div class="section" id="dli_spark_datepart__en-us_topic_0000001645954790_section992014913317"><h4 class="sectiontitle">Parameters</h4>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="dli_spark_datepart__en-us_topic_0000001645954790_table1829154762513" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Parameters</caption><thead align="left"><tr id="dli_spark_datepart__en-us_topic_0000001645954790_row8830104792517"><th align="left" class="cellrowborder" valign="top" width="19.220000000000002%" id="mcps1.3.3.2.2.5.1.1"><p id="dli_spark_datepart__en-us_topic_0000001645954790_p983074711252">Parameter</p>
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</th>
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<th align="left" class="cellrowborder" valign="top" width="13.43%" id="mcps1.3.3.2.2.5.1.2"><p id="dli_spark_datepart__en-us_topic_0000001645954790_p6830124732517">Mandatory</p>
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</th>
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<th align="left" class="cellrowborder" valign="top" width="20.62%" id="mcps1.3.3.2.2.5.1.3"><p id="dli_spark_datepart__en-us_topic_0000001645954790_p13318164512614">Type</p>
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</th>
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<th align="left" class="cellrowborder" valign="top" width="46.73%" id="mcps1.3.3.2.2.5.1.4"><p id="dli_spark_datepart__en-us_topic_0000001645954790_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_datepart__en-us_topic_0000001645954790_row15830184792511"><td class="cellrowborder" valign="top" width="19.220000000000002%" headers="mcps1.3.3.2.2.5.1.1 "><p id="dli_spark_datepart__en-us_topic_0000001645954790_p683034714250">date</p>
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</td>
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<td class="cellrowborder" valign="top" width="13.43%" headers="mcps1.3.3.2.2.5.1.2 "><p id="dli_spark_datepart__en-us_topic_0000001645954790_p12830184752518">Yes</p>
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</td>
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<td class="cellrowborder" valign="top" width="20.62%" headers="mcps1.3.3.2.2.5.1.3 "><p id="dli_spark_datepart__en-us_topic_0000001645954790_p2098843181320">DATE</p>
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<p id="dli_spark_datepart__en-us_topic_0000001645954790_p158591444191319">or</p>
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<p id="dli_spark_datepart__en-us_topic_0000001645954790_p0318545102615">STRING</p>
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</td>
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<td class="cellrowborder" valign="top" width="46.73%" headers="mcps1.3.3.2.2.5.1.4 "><p id="dli_spark_datepart__en-us_topic_0000001645954790_p189251333161511">Start date</p>
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<p id="dli_spark_datepart__en-us_topic_0000001645954790_p262017013166">The following formats are supported:</p>
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<ul id="dli_spark_datepart__en-us_topic_0000001645954790_ul18403171617"><li id="dli_spark_datepart__en-us_topic_0000001645954790_li20849331611">yyyy-mm-dd</li><li id="dli_spark_datepart__en-us_topic_0000001645954790_li9841137169">yyyy-mm-dd hh:mi:ss</li><li id="dli_spark_datepart__en-us_topic_0000001645954790_li784203121614">yyyy-mm-dd hh:mi:ss.ff3</li></ul>
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</td>
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</tr>
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<tr id="dli_spark_datepart__en-us_topic_0000001645954790_row295054517207"><td class="cellrowborder" valign="top" width="19.220000000000002%" headers="mcps1.3.3.2.2.5.1.1 "><p id="dli_spark_datepart__en-us_topic_0000001645954790_p5950194582015">datepart</p>
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</td>
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<td class="cellrowborder" valign="top" width="13.43%" headers="mcps1.3.3.2.2.5.1.2 "><p id="dli_spark_datepart__en-us_topic_0000001645954790_p14950104515207">Yes</p>
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</td>
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<td class="cellrowborder" valign="top" width="20.62%" headers="mcps1.3.3.2.2.5.1.3 "><p id="dli_spark_datepart__en-us_topic_0000001645954790_p9950194582011">STRING</p>
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</td>
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<td class="cellrowborder" valign="top" width="46.73%" headers="mcps1.3.3.2.2.5.1.4 "><p id="dli_spark_datepart__en-us_topic_0000001645954790_p157541402116">Time unit of the value to be returned</p>
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<p id="dli_spark_datepart__en-us_topic_0000001645954790_p1995034510202">This parameter supports the following extended date formats: year, month or mon, day, and hour.</p>
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<ul id="dli_spark_datepart__en-us_topic_0000001645954790_ul5326124018213"><li id="dli_spark_datepart__en-us_topic_0000001645954790_li1332634082113"><strong id="dli_spark_datepart__en-us_topic_0000001645954790_b107443122535529">YYYY</strong> or <strong id="dli_spark_datepart__en-us_topic_0000001645954790_b17958160035529">yyyy</strong> indicates the year.</li><li id="dli_spark_datepart__en-us_topic_0000001645954790_li18326134020211"><strong id="dli_spark_datepart__en-us_topic_0000001645954790_b13957376135540">MM</strong> indicates the month.</li><li id="dli_spark_datepart__en-us_topic_0000001645954790_li83267401213"><strong id="dli_spark_datepart__en-us_topic_0000001645954790_b208498118235549">mm</strong> indicates the minute.</li><li id="dli_spark_datepart__en-us_topic_0000001645954790_li19326040152117"><strong id="dli_spark_datepart__en-us_topic_0000001645954790_b76187650835555">dd</strong> indicates the day.</li><li id="dli_spark_datepart__en-us_topic_0000001645954790_li3326154018212"><strong id="dli_spark_datepart__en-us_topic_0000001645954790_b78460062235619">HH</strong> indicates the 24-hour clock.</li><li id="dli_spark_datepart__en-us_topic_0000001645954790_li3326104016218"><strong id="dli_spark_datepart__en-us_topic_0000001645954790_b149353116535632">hh</strong> indicates the 12-hour clock.</li><li id="dli_spark_datepart__en-us_topic_0000001645954790_li13261640132117"><strong id="dli_spark_datepart__en-us_topic_0000001645954790_b10508334935639">mi</strong> indicates the minute.</li><li id="dli_spark_datepart__en-us_topic_0000001645954790_li532619407218"><strong id="dli_spark_datepart__en-us_topic_0000001645954790_b60839935235649">ss</strong> indicates the second.</li><li id="dli_spark_datepart__en-us_topic_0000001645954790_li153266409211"><strong id="dli_spark_datepart__en-us_topic_0000001645954790_b162969263035656">SSS</strong> indicates millisecond.</li></ul>
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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_datepart__en-us_topic_0000001645954790_section210162513312"><h4 class="sectiontitle">Return Values</h4><p id="dli_spark_datepart__en-us_topic_0000001645954790_p136202119551">The return value is of the BIGINT type.</p>
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<div class="note" id="dli_spark_datepart__en-us_topic_0000001645954790_note61422099395"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="dli_spark_datepart__en-us_topic_0000001645954790_ul1419951023915"><li id="dli_spark_datepart__en-us_topic_0000001645954790_li8884025142219">If the value of <strong id="dli_spark_datepart__en-us_topic_0000001645954790_b36695334452">date</strong> is not of the DATE or STRING type, the error message "data type mismatch" is displayed.</li><li id="dli_spark_datepart__en-us_topic_0000001645954790_li12450134715369">If the value of <strong id="dli_spark_datepart__en-us_topic_0000001645954790_b68721036124511">date</strong> is of the DATE or STRING type but is not in one of the supported formats, <strong id="dli_spark_datepart__en-us_topic_0000001645954790_b1487213365451">NULL</strong> is returned.</li><li id="dli_spark_datepart__en-us_topic_0000001645954790_li166390243282">If the value of <strong id="dli_spark_datepart__en-us_topic_0000001645954790_b93190165053339">datepart</strong> is <strong id="dli_spark_datepart__en-us_topic_0000001645954790_b112433481353339">NULL</strong>, <strong id="dli_spark_datepart__en-us_topic_0000001645954790_b103155082453339">NULL</strong> is returned.</li><li id="dli_spark_datepart__en-us_topic_0000001645954790_li2639172472810">If the value of <strong id="dli_spark_datepart__en-us_topic_0000001645954790_b210562263653339">datepart</strong> is <strong id="dli_spark_datepart__en-us_topic_0000001645954790_b153617410053339">NULL</strong>, <strong id="dli_spark_datepart__en-us_topic_0000001645954790_b166182576553339">NULL</strong> is returned.</li></ul>
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</div></div>
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</div>
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<div class="section" id="dli_spark_datepart__en-us_topic_0000001645954790_section13277192233920"><h4 class="sectiontitle">Example Code</h4><p id="dli_spark_datepart__en-us_topic_0000001645954790_p19454254104111">The value <strong id="dli_spark_datepart__en-us_topic_0000001645954790_b297034417451">2023</strong> is returned.</p>
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<pre class="screen" id="dli_spark_datepart__en-us_topic_0000001645954790_screen7663214134217">select datepart(date '2023-08-14 17:00:00', 'yyyy');</pre>
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<p id="dli_spark_datepart__en-us_topic_0000001645954790_p44531654104117">The value <strong id="dli_spark_datepart__en-us_topic_0000001645954790_b452095684520">2023</strong> is returned.</p>
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<pre class="screen" id="dli_spark_datepart__en-us_topic_0000001645954790_screen12119019174215">select datepart('2023-08-14 17:00:00', 'yyyy');</pre>
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<p id="dli_spark_datepart__en-us_topic_0000001645954790_p17453125418419">The value <strong id="dli_spark_datepart__en-us_topic_0000001645954790_b1856517104615">0</strong> is returned.</p>
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<pre class="screen" id="dli_spark_datepart__en-us_topic_0000001645954790_screen11122202614219">select datepart(date '2023-08-14 17:00:00', 'mi');</pre>
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<p id="dli_spark_datepart__en-us_topic_0000001645954790_p6453165416411">The value <strong id="dli_spark_datepart__en-us_topic_0000001645954790_b19807141113463">NULL</strong> is returned.</p>
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<pre class="screen" id="dli_spark_datepart__en-us_topic_0000001645954790_screen1088793234215">select datepart(date '2023-08-14', null);</pre>
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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_0471.html">Date Functions</a></div>
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</div>
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</div>
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