題目鏈接：

Leetcode-184

Employee?表包含所有員工信息，每個員工有其對應的?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?表包含公司所有部門的信息。

+----+----------+ | Id | Name | +----+----------+ | 1 | IT | | 2 | Sales | +----+----------+

編寫一個 SQL 查詢，找出每個部門工資最高的員工。例如，根據上述給定的表格，Max 在 IT 部門有最高工資，Henry 在 Sales 部門有最高工資。

+------------+----------+--------+ | Department | Employee | Salary | +------------+----------+--------+ | IT | Max | 90000 | | Sales | Henry | 80000 | +------------+----------+--------+

解題代碼：

# Write your MySQL query statement below SELECT Department.Name AS Department,Employee.Name AS Employee,Employee.Salary AS Salary FROM Department JOIN Employee ON Department.Id = Employee.DepartmentId WHERE Employee.Salary = (SELECT MAX(salary) FROM Employee AS e WHERE e.departmentId = Employee.DepartmentId)

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