行轉列,列轉行,圖一轉圖二或圖二轉圖一
阿新 • • 發佈:2018-11-14
col ont rom clas 轉行 chinese hang cor div
圖一:
Nam | Course | Score |
zhangsan | Chinese | 85 |
zhangsan | Maths | 76 |
zhangsan | English | 80 |
lisi | Chinese | 82 |
lisi | Maths | 90 |
lisi | English | 55 |
圖二:
Nam | Chinese | Maths | English |
zhangsan | 85 | 76 | 80 |
lisi | 82 | 90 | 55 |
圖一轉圖二:
SELECT Nam, SUM( IF (Course = ‘Chinese‘, Score, 0) ) Chinese,SUM(IF(Course = ‘Maths‘, Score, 0)) Maths, SUM( IF (Course = ‘English‘, Score, 0) ) english FROM t GROUP BY Nam
圖二轉圖一:
(SELECT Nam, ‘Chinese‘Course, Chinese Score FROM t2) UNION (SELECT Nam, ‘Maths‘ Course , Maths Score FROM t2) UNION (SELECT Nam, ‘English‘ Course , English Score FROMt2) ORDER BY Nam DESC
行轉列,列轉行,圖一轉圖二或圖二轉圖一