标签:io for 数据 on c sql as rom r
-- 数据透视
-- PIVOT: 行转列
SELECT * FROM
(
SELECT N‘张三‘ AS 姓名, N‘语文‘ AS 课程,70 AS 分数 UNION
SELECT N‘张三‘ AS 姓名, N‘数学‘ AS 课程,90 AS 分数 UNION
SELECT N‘李四‘ AS 姓名, N‘语文‘ AS 课程,85 AS 分数 UNION
SELECT N‘李四‘ AS 姓名, N‘数学‘ AS 课程,85 AS 分数
) AS A
PIVOT
(
MAX(分数)
FOR 课程
IN(语文, 数学)
) AS B-- UNPIVOT: 列转行
SELECT 姓名, 课程, 分数 FROM
(
SELECT N‘张三‘ AS 姓名, 70 AS 语文, 90 AS 数学 UNION
SELECT N‘李四‘ AS 姓名, 85 AS 语文, 85 AS 数学
) AS B
UNPIVOT
(
分数
FOR 课程
IN(语文, 数学)
) AS A
标签:io for 数据 on c sql as rom r
原文地址:http://www.cnblogs.com/zisezhixin/p/3945880.html