Mysql语句的批量操作[修改]

 UPDATE `cla_info` SET 

 `comment` =  CASE
 WHEN (`score` >= 95) THEN 'A'
 WHEN (`score` < 95 AND `score` >= 80) THEN 'B'
 WHEN (`score` < 80 AND `score` >= 60) THEN 'C'
 WHEN (`score` < 60) THEN 'D'
 END, 

 `collect` = CASE
 WHEN (`score` >= 95) THEN 'X'
 WHEN (`score` < 95 AND `score` >= 60) THEN 'Y'
 WHEN (`score` < 60) THEN 'Z'
 END 

 WHERE `id` > 2