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mysql 将字段值中的第一个逗号前面的数据作为查询条件

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Release： 2016-06-01 09:57:07
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sql语句如下：

<code class="language-sql">select count(*) as lot from OA_sample_check where left(ecnNO, LOCATE(',',ecnNO)-1)='a1' </code>
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