mysql-函数if多值多结果判断

时间:2024-06-04 10:37:32

if语句

案例:同样统计男女生人数,语句如下:

SELECT school,COUNT(school) 人数,SUM(IF(sex='男',1,0)) 男生数,SUM(IF(sex='女',1,0)) 女生数,
  SUM(IF(pass=1,1,0)) pass1,SUM(IF(pass=0,1,0)) pass0,
  SUM(IF(state=1,1,0)) state1,SUM(IF(state=0,1,0)) state0
FROM sch
  GROUP BY sex,school