使用group by的SQL查询

Question

I have a table called "EMP" and two collumns one called "deptno" and the other called "job". I need a query to find out how many people there are in each type of job within each department.

I know I need to use count() and group by but im not sure how to do this, any help would be appreciated.

Thanks James.

Answer 1

select job, deptno, count(*) as people
from emp
group by job, deptno

Answer 2

  SELECT JOB, DEPTNO, count(1) AS EMP_COUNT
  FROM EMP
  GROUP BY JOB, DEPTNO;

Answer 3

Try This

select job, deptno, count(*) as TotEmp
from emp
group by job, deptno