按性别列出员工人数

Question

我正在尝试实现此输出

illegal base64 data at input byte 88

我的代码是

SEX       Number
Male       5
Female      7   

我得到的输出是

SELECT COUNT(CASE WHEN SEX = 'M' then 1 end) as Male, COUNT(CASE WHEN SEX = 'F' then 1 end) as Female FROM EMPLOYEE

我在做什么错？有人可以帮忙吗？

Answer 1

使用下面的按性别查询分组

  SELECT
        CASE WHEN Sex ='M' THEN "Male"
             WHEN Sex ='F' THEN "Female"
        END AS Sex ,
        COUNT(*) as Number
   FROM OrderDetails 
  GROUP BY Sex;

Answer 2

问题是您需要对行的值进行分组，而不是仅仅对它们进行计数。

SELECT SEX, COUNT(SEX) FROM EMPLOYEE GROUP BY SEX