回复：这个Query好美意义哦～我姐要我说滴

来源: slow_quick 于 2013-03-06 10:02:08 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (113 bytes)

SELECT * FROM A

UNION

SELECT * FROM B WHERE NOT EXISTS (SELECT * FROM A WHERE A.PK = B.PK)

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