题解 | 获取所有员工当前的manager
获取所有员工当前的manager
https://www.nowcoder.com/practice/e50d92b8673a440ebdf3a517b5b37d62
select a.emp_no,case when a.emp_no <> b.emp_no then b.emp_no end as manager from dept_emp a join dept_manager b on a.dept_no = b.dept_no where case when a.emp_no <> b.emp_no then b.emp_no end is not null
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