题解 | #统计各个部门的工资记录数#
统计各个部门的工资记录数
https://www.nowcoder.com/practice/6a62b6c0a7324350a6d9959fa7c21db3
select dp.dept_no,dp.dept_name,count(sa.emp_no) from departments dp join dept_emp de on de.dept_no=dp.dept_no join salaries sa on de.emp_no=sa.emp_no group by dp.dept_no order by de.dept_no;


