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mysql表中datetime类型的字段名createtime,查询所有createtime为空的语句如下:
select * from yy_business where ISNULL(createtime) is TRUE
update yy_business set createtime=‘2015-01-21 17:24:58‘ where ISNULL(createtime) is TRUE
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原文地址:http://www.cnblogs.com/sdfiggtx/p/5158888.html