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mysql-Mysql写过程函数问题，求帮助

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Release： 2016-06-06 09:37:14
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mysqlsql数据库

求写一个sql函数，控制一张表的status字段

当现实时间大于表中datatime字段中的时间则 修改status字段值为1

大概就是在创建一个活动时，数据库自己 按小时 执行函数，直到当满足条件时修改status字段值为1。

求思路或者大概写法，

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mysql sql 数据库
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