题解 | SQL218 查找所有员工的last_name和first_name以及对应的name
WITH t1 AS (
SELECT
e.last_name,
e.first_name,
d.dept_name
FROM employees e
LEFT JOIN dept_emp de
ON e.emp_no = de.emp_no
LEFT JOIN departments d
ON de.dept_no = d.dept_no
)
SELECT * FROM t1;
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