mysql 将列值转变为列的方法

复制代码 代码如下:-- 创建库CREATE TABLE `rate` (`uname` VARCHAR (300),`object` VARCHAR (300),`score` VARCHAR (300));-- 插入数据INSERT INTO test.rate (uname, object, score)VALUES('aaa', 'chinese', '67'),('aaa', 'math', '89'),('aaa', 'physical', '89'),('bbb', 'chinese', '67'),('bbb', 'math', '75'),('bbb', 'physical', '89');-- 查询SELECT DISTINCT uname AS '姓名',SUM(CASE objectWHEN 'chinese' THEN score END) AS '语文',SUM(CASE objectWHEN 'math' THEN score END) AS '数学',SUM(CASE objectWHEN 'physical' THEN score END) AS '物理' FROM rate GROUP BY uname;