LeetCode：Employees Earning More Than Their Manager

時間 2019-11-05

標籤 leetcode employees earning manager 简体版

原文原文鏈接

一、題目名稱sql

Employees Earning More Than Their Managers（比領導工資還高的員工）數據庫

二、題目地址命令行

https://leetcode.com/problems/employees-earning-more-than-their-managers/code

三、題目內容leetcode

Employee表的結構包含四列：Id、Name、Salary、ManagerId，找出其中工資高於直接上級的員工的Name。get

例如，下表中Joe的工資大於他的直接上級Sam：class

+----+-------+--------+-----------+
| Id | Name  | Salary | ManagerId |
+----+-------+--------+-----------+
| 1  | Joe   | 70000  | 3         |
| 2  | Henry | 80000  | 4         |
| 3  | Sam   | 60000  | NULL      |
| 4  | Max   | 90000  | NULL      |
+----+-------+--------+-----------+

四、初始化數據庫腳本數據

在MySQL數據庫中創建一個名爲LEETCODE的數據庫，用MySQL命令行中的source命令執行下面腳本：腳本

-- 執行腳本前必須創建名爲LEETCODE的DATABASE
USE LEETCODE;

DROP TABLE IF EXISTS Employee;
CREATE TABLE Employee (
    Id INT NOT NULL PRIMARY KEY,
    Name VARCHAR(50),
    Salary INT,
    ManagerId INT
);

INSERT INTO Employee (Id, Name, Salary, ManagerId) VALUES (1, 'Joe', 70000, 3);
INSERT INTO Employee (Id, Name, Salary, ManagerId) VALUES (2, 'Henry', 80000, 4);
INSERT INTO Employee (Id, Name, Salary, ManagerId) VALUES (3, 'Sam', 60000, NULL);
INSERT INTO Employee (Id, Name, Salary, ManagerId) VALUES (4, 'Max', 90000, NULL);

五、解題SQLco

解題SQL以下：

SELECT Name
FROM Employee AS A
WHERE Salary > (
  SELECT Salary
  FROM Employee AS B
  WHERE Id = A.ManagerId
);

END

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