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我想打一个查询可以例如检查完全空 :SQL检查选择返回NULL
select a where
case
when a like %b%
then a like %b% (if after search every row of table still return null)
else
a like %c% (if have match in any row skip else statement)
+1有多快? :) – 2013-02-19 18:18:09
让我看看^^ thz这么多 – 2013-02-19 18:21:40