Question

T1：员工[身份证，工资]

T2：部门[姓名，员工] （employeeid是T1的id的外键）

问题：编写查询以获取获得最高薪水的部门名称。

我的解决方案：

SELECT DISTINCT name
FROM department AS a
INNER JOIN employee AS b ON a.employeeid = b.id
AND b.salary
IN (    
    SELECT max( salary )
    FROM employee AS c
)

编辑：问题陈述是准确的，我们不是要找出薪水最高的员工。它说“......收到.....的部门”，而不是“......收到......的员工。”

这可以吗？或者这可以优化吗？

Answer 1

GROUP BY部门的名称和按SUM（工资）的顺序。

SELECT department.name
FROM department
JOIN employee ON department.employeeid = employee.id
GROUP BY department.name
ORDER BY SUM(salary) DESC
LIMIT 1

Answer 2

怎么样：

SELECT employee.id, employee.salary, department.name
FROM department, employee 
where 
employee.id = department.employeeid and
employee.salary = (select max(salary) from employee)

内部加入：这是一个最佳解决方案吗？

2 个答案: