update 可以与left join 一起用吗?
各位大神,我是这么写的,好像不对,能帮我改改吗?谢谢!
$query = "UPDATE a,b set a.sta = '3',b.scores='b.scores+a.pname' from `member_operation` WHERE aid = '$var' as a left join `member` as b on a.mid=b.mid ";
member_operation WHERE aid = '$var表和member表通过 a.mid=b.mid相联。
我想使得member_operation 表中的sta = '3',member表中的scores等于原有值加上member_operation 中pname值。