站长资源网络编程
删除A表中在B表中不存在的数据
简介select UserName from TableA where UserName not in (select UserName from TableB where TableA.UserName=TableB.UserName) order by UserName desc
select UserName from TableA where UserName not in (select UserName from TableB where TableA.UserName=TableB.UserName) order by UserName desc
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