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SQL: Case when then

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SELECT  b.年度 as '年份',
        sum(b.quarter1) as '1季度',
        sum(b.quarter2) as '2季度',
        sum(b.quarter3) as '3季度',
        sum(b.quarter4) as '4季度' From(
        select a.年度,
        case a.季度 when 1 then a.数量 else 0 end as quarter1,
        case a.季度 when 2 then a.数量 else 0 end as quarter2,
        case a.季度 when 3 then a.数量 else 0 end as quarter3,
        case a.季度 when 4 then a.数量 else 0 end as quarter4
        FROM Case_Test a)b
        group by b.年度

 

 

posted @ 2012-05-05 02:24  The Mechanic  阅读(148)  评论(0)  编辑  收藏  举报