列相等与不等
摘要：
declare @f1 int, @v1 intset @f1=nullset @v1=nullif @f1=@v1 or (@f1 is null and @v1 is null)print '相同' else print '不同'if @f1<>@v1 or (@f1 is null and @v1 is not null) or (@f1 is not null and @v1 ... 阅读全文
posted @ 2010-01-23 22:46 大尾巴狼 阅读(401) 评论(0) 推荐(0) 编辑
