1 declare @lx varchar(2) 2 set @lx='' 3 select @lx,* from ZJZHLX where 1=1 and (zjzhlx_lxbh=@lx or @lx='' or @lx=null)
posted on 2015-08-10 16:55 陸九淵 阅读(139) 评论(5) 编辑 收藏 举报
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