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[轉載]sql if exists() else用法_980044201_新浪博客
[轉載]sql if exists() else用法_980044201_新浪博客,980044201, ... 如例: declare @message varchar(200), @name varchar(200) if exists(select * from students where 學號='1005') begin set @message='下列人員符合條件:'
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