select * from tableA
union
select * from tableB
where not exists(select * from tableA where pk = tableB.pk)
or
select * from tableA
union
select * from tableB
where pk not in (select pk from tableA)
or use union all
回复:how to deal exist? 不搞的这么复杂
所有跟帖:
•
OK, I'll try. Thanks, vielen dank.Merci, תוד&#
-奉旨灌水-
♀
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03/05/2013 postreply
20:25:40