统计员工性别并返回数据:
select if(gender=1,'man','women') 性别,count(*) from tb_emp group by gender;
统计员工职位并返回数据:
selectcase job when 1 then '班主任'when 2 then '讲师'when 3 then '学工主管'when 4 then '教研主管'else '未分配' end 职位,count(*)
from tb_emp
group by job;
总结: