mysql行转列

SELECT IFNULL(userid,'TOTAL') AS userid,

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,

SUM(IF(`subject`='政治',score,0)) AS 政治,

SUM(score) AS TOTAL

FROM tb_score

GROUP BY userid WITH ROLLUP;

SET @EE='';

select @EE :=CONCAT(@EE,'sum(if(subject= \'',subject,'\',score,0)) as ',subject, ',') AS aa FROM (SELECT DISTINCT subject FROM tb_score) A ;

SET @QQ = CONCAT('select ifnull(userid,\'TOTAL\')as userid,',@EE,' sum(score) as TOTAL from tb_score group by userid WITH ROLLUP');

-- SELECT @QQ;

PREPARE stmt FROM @QQ;

EXECUTE stmt;

DEALLOCATE PREPARE stmt;