存储过程完整代码.

CREATE DEFINER=`root`@`localhost` PROCEDURE `cj_zongfen`()

BEGIN

DECLARE yw INT;#语文成绩

DECLARE sx INT;#数学成绩

DECLARE yy INT;#英语成绩

DECLARE d INT;

DECLARE nf BOOLEAN DEFAULT TRUE;

DECLARE zongfen_cursor CURSOR FOR  SELECT yuwen,shuxue,yingyu,cid FROM cj;

DECLARE CONTINUE HANDLER FOR NOT FOUND SET nf=FALSE;

OPEN zongfen_cursor;

FETCH zongfen_cursor INTO yw,sx,yy,d;

WHILE nf DO

UPDATE cj SET zongfen=yw+sx+yy WHERE cid=d;

FETCH zongfen_cursor INTO yw,sx,yy,d;

END WHILE;

END$$