MySQL動態行轉列

標籤：

建立源表和插入來源資料

DROP TABLE IF EXISTS `score`;CREATE TABLE `score` (  `id` int(11) NOT NULL AUTO_INCREMENT,  `class` varchar(255) DEFAULT NULL,  `score` double DEFAULT NULL,  `userid` int(11) DEFAULT NULL,  PRIMARY KEY (`id`)) ENGINE=InnoDB AUTO_INCREMENT=8 DEFAULT CHARSET=latin1;

INSERT INTO `score` VALUES (‘1‘, ‘math‘, ‘90‘, ‘1‘);INSERT INTO `score` VALUES (‘2‘, ‘english‘, ‘90‘, ‘1‘);INSERT INTO `score` VALUES (‘3‘, ‘computer‘, ‘80‘, ‘1‘);INSERT INTO `score` VALUES (‘4‘, ‘sports‘, ‘90‘, ‘1‘);INSERT INTO `score` VALUES (‘5‘, ‘math‘, ‘80‘, ‘2‘);INSERT INTO `score` VALUES (‘6‘, ‘english‘, ‘85‘, ‘2‘);INSERT INTO `score` VALUES (‘7‘, ‘computer‘, ‘100‘, ‘2‘);

原表記錄

需要查詢出的結果記錄

查詢語句：

SET @EE=‘‘;set @str_tmp=‘‘;SELECT @EE:=CONCAT(@EE,‘SUM(IF(class=\‘‘,class,‘\‘‘,‘,score,0)) AS ‘,class,‘,‘) as aa into @str_tmp FROM (SELECT DISTINCT class FROM score) A order by length(aa) desc limit 1; SET @QQ=CONCAT(‘SELECT ifnull(score.userid,\‘total\‘),‘,LEFT(@str_tmp,char_length(@str_tmp)-1),‘  ,SUM(score) AS TOTAL FROM score GROUP BY userid WITH ROLLUP‘);PREPARE stmt  FROM @QQ; EXECUTE stmt ;deallocate prepare stmt;

 

MySQL動態行轉列