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
http://www.nowcoder.com/practice/4bcb6a7d3e39423291d2f7bdbbff87f8
答案不知道为什么与正确答案不一样,无奈之下,只能在ORDER BY e.dept_no的基础之上在加入t.title。
SELECT e.dept_no, d.dept_name, t.title, COUNT(t.title) as count FROM titles as t, dept_emp as e, departments as d WHERE t.emp_no = e.emp_no and e.dept_no = d.dept_no and e.to_date = '9999-01-01' and t.to_date = '9999-01-01' GROUP BY d.dept_no, t.title ORDER BY e.dept_no, t.title ASC