题解 | #汇总各个部门当前员工的title类型的分配数目#
汇总各个部门当前员工的title类型的分配数目
https://www.nowcoder.com/practice/4bcb6a7d3e39423291d2f7bdbbff87f8
select a.dept_no,a.dept_name,t.title, count(t.emp_no) count from departments a inner join dept_emp b on a.dept_no = b.dept_no inner join titles t on t.emp_no = b.emp_no group by a.dept_no,a.dept_name,t.title order by a.dept_no,t.title