一个使用统计语句select sum(case when ... then ... end) ...(转)
摘要：一个统计需求，需要统计产品表中下线产品数量、上线产品数量、热销产品数量、折扣产品数量。要求用一个SQL语句实现！想到用sum(case when ...then ... end), 如下所示：Select Sum(case when IsOnline = 1 then 1 else 0 end) as OnlineProducts,Sum(case when IsOnline = 0 then 1 else 0 end) as OfflineProducts,Sum(case when IsHot = 1 then 1 else 0 end) as HotProducts,Sum(case .
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posted @ 2011-12-30 15:11
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