问一个论坛短消息群发的sql语句。
上面是DISCUZ的短消息群发数据表,请问怎么查询用户没有阅读的短消息呢?
回复讨论(解决方案)
select * from 用户记录表 a inner join 消息表 b on a.gpmid=b.id where a.status=0
select * from 用户记录表 a inner join 消息表 b on a.gpmid=b.id where a.status=0
不好意思,是我问题描述不清楚,
我的意思是,查询每个用户没有阅读的短消息,
就是a用户阅读过后,就不再显示了,但如果b用户没阅读就会显示。
不知道你的数据是如何分步的,建议贴出测试数据和期望结果,并简单描述一下逻辑关系。
selece uid pre_common_member_grouppm where status=0
将得到所有为阅读的短消息的用户
至于以后要如何做,那要由你决定,我不能代庖

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