题解 | #查找所有员工的last_name和first_name以及对应的dept_name#
查找所有员工的last_name和first_name以及对应的dept_name
http://www.nowcoder.com/practice/5a7975fabe1146329cee4f670c27ad55
select e.last_name, e.first_name, t.dept_name
from employees e
left join (
select de.emp_no, de.dept_no, d.dept_name
from dept_emp de
inner join departments d
on de.dept_no = d.dept_no
where to_date = '9999-01-01') as t
on e.emp_no = t.emp_no
from employees e
left join (
select de.emp_no, de.dept_no, d.dept_name
from dept_emp de
inner join departments d
on de.dept_no = d.dept_no
where to_date = '9999-01-01') as t
on e.emp_no = t.emp_no
，不说了，我又接了一单
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