摘要：
UPDATE aa set Col_Col=casewhen aa.Col_Col is null or aa.Col_Col='' then bb.col_colelse aa.Col_Colend --,aa.Col_Col,bb.Col_Col,*from (select * from d_col_detail where CONVERT(varchar(10),Modtime,120)=convert(varchar(10),GETDATE(),120)and Db_name='EMBASE.EMBase2') aainner join (select 阅读全文