CREATE procedure dbo.select_a
@b varchar(50),
@c varchar(50),
@d varchar(50),
@e varchar(50)
as
declare @strsql varchar(5000) ;
set @strsql=‘select * from a where 1=1 ‘;
if @b <>‘‘
set @strsql= @strsql+‘ and b="‘+@b +‘"‘;
if @c <>‘‘
set @strsql= @strsql+‘ and c="‘+@c +‘"‘;
if @d <>‘‘
set @strsql= @strsql+‘ and d="‘+@d +‘"‘;
if @e <>‘‘
set @strsql= @strsql+‘ and e="‘+@e +‘"‘;
exec (@strsql)
GO
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原文：http://www.jb51.net/article/8729.htm
