CREATEproceduredbo.select_a @bvarchar(50), @cvarchar(50), @dvarchar(50), @evarchar(50) as declare@strsqlvarchar(5000); set@strsql='select*fromawhere1=1'; if@b'' set@strsql=@strsql+'andb="'+@b+'"'; if@c'' set@strsql=@strsql+'andc="'+@c+'"'; if@d'' set@strsql=@strsql+'andd="'+@d+'"'; if@e'' set@strsql=@strsql+'ande="'+@e+'"'; exec(@strsql) GO
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