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两表的联合查询有关问题

热度:97   发布时间:2016-04-27 13:36:33.0
两表的联合查询问题
现在有表A与表B:

表A
Id User Value
1 aa 3
2 bb 6
3 cc 2
4 dd 3
5 ee 1

表B
UId Value
1 3
2 5
3 2
1 7
5 4

要获取表A的的数据,条件A.Id <> B.UId And A.Value <> B.Value(同一记录),这样的查询怎样写效率高?



------解决方案--------------------
SQL code
--05select id,value from aexceptselect uid,value from b-----orselect *from a twhere not exists (select 1 from b where uid = t.id or value = t.value)
------解决方案--------------------
SQL code
select A.* from Ainner join B on A.Id<>B.UId and A.Value <> B.Value
------解决方案--------------------
SQL code
select *from awhere not exists (select 1 from b where uid = a.id or value = a.value)
------解决方案--------------------

select * from A where not exists( 
A.ID=B.UID and A.value=B.value)
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