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ERROR 1222 (21000): The used SELECT statements have a differ_MySQL

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Release： 2016-06-01 13:21:05
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bitsCN.com 1) ERROR 1222 (21000): The used SELECT statements have a different number of columns :

　　这是因为使用union的两个SQL语句产生的记录的表结构不一致. 必须是结构完全一致的记录集合才可以使用UNION.

以上就是两个表的字段不一样，导致，所以大家可以检查下。bitsCN.com

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