sql行转列

创建数据库

 CREATE DATABASE `ceshi`CHARACTER SET utf8 COLLATE utf8_general_ci;

建表

CREATE TABLE exampleTable (course VARCHAR(20),teacher VARCHAR(20),student VARCHAR(20),score  INT) ;

插入数据

INSERT INTO exampleTable (course,teacher,student,score) VALUES ('数学',' 王华','丽丽',60);


INSERT INTO exampleTable (course,teacher,student,score) VALUES ('数学',' 王华','李四',30);


INSERT INTO exampleTable (course,teacher,student,score) VALUES ('语文',' 张三','丽丽',70);


INSERT INTO exampleTable (course,teacher,student,score) VALUES ('语文',' 张三','李四',80);

SELECT student,


SUM(CASE course WHEN '数学' THEN score ELSE 0 END) AS '数学' ,


SUM(CASE course WHEN '语文' THEN score ELSE 0 END) AS '语文'


FROM exampleTable GROUP BY student;

结果