分组统计

Posted 2020-07-10

SELECT
 MName,
 SUM(CASE B.FName WHEN ‘语文‘ THEN A.Score END) AS 语文, 
 SUM(CASE B.FName WHEN ‘数学‘ THEN A.Score END) AS 数学, 
 SUM(CASE B.FName WHEN ‘英语‘ THEN A.Score END) AS 英语, 
 SUM(CASE B.FName WHEN ‘历史‘ THEN A.Score END) AS 历史
FROM dbo.Member
LEFT JOIN dbo.Score A ON A.MID = Member.MID
LEFT JOIN F B ON B.FID = A.FID
GROUP BY MName