【LeetCode】打卡–SQL184. 部门工资最高的员工
题目
Employee
表包含所有员工信息,每个员工有其对应的 Id, salary 和 department Id。
+----+-------+--------+--------------+ | Id | Name | Salary | DepartmentId | +----+-------+--------+--------------+ | 1 | Joe | 70000 | 1 | | 2 | Henry | 80000 | 2 | | 3 | Sam | 60000 | 2 | | 4 | Max | 90000 | 1 | +----+-------+--------+--------------+
Department
表包含公司所有部门的信息。
+----+----------+ | Id | Name | +----+----------+ | 1 | IT | | 2 | Sales | +----+----------+
编写一个 SQL 查询,找出每个部门工资最高的员工。例如,根据上述给定的表格,Max 在 IT 部门有最高工资,Henry 在 Sales 部门有最高工资。
+------------+----------+--------+ | Department | Employee | Salary | +------------+----------+--------+ | IT | Max | 90000 | | Sales | Henry | 80000 | +------------+----------+--------+
解答
/* Write your T-SQL query statement below */
Select
D.Name As Department,
E1.Name As Employee,
Salary
From
Employee As E1,Department As D
Where
E1.DepartmentId = D.Id
And
Salary >=
(Select
Max(Salary) As Salary
From
Employee As E2
Where
E2.DepartmentId = D.Id
)
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