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  time nvarchar(20)
2010-5-6
2010-5-7
2010-5-8
2010-5-10
2010-5-11

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select * from t1 where CONVERT(varchar,ʱ¼ä,120) >= '2010-5-10'



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insert A select * from A right join B on A.key=b.key where A.key is null


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