Mysql行转列

1. 表如下
   
2. 第一种 case when then

SELECT
s.name,
SUM( CASE s.subject WHEN ‘语文’ THEN s.score ELSE 0 END ) AS ‘语文’,
SUM( CASE s.subject WHEN ‘数学’ THEN s.score ELSE 0 END ) AS ‘数学’,
SUM( CASE s.subject WHEN ‘英语’ THEN s.score ELSE 0 END ) AS ‘英语’
FROM
score s
GROUP BY
s.NAME

3. 第二种if

SELECT s.name,
SUM(IF(subject=‘语文’,score,0)) as ‘语文’,
SUM(IF(subject=‘数学’,score,0)) as ‘数学’,
SUM(IF(subject=‘英语’,score,0)) as ‘英语’
FROM score s
GROUP BY s.name

4. 查询结果