Question:

The Employee table holds all employees including their managers. Every employee has an Id, and there is also a column for the manager Id.

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

Given the Employee table, write a SQL query that finds out employees who earn more than their managers. For the above table, Joe is the only employee who earns more than his manager.

+----------+
| Employee |
+----------+
| Joe |
+----------+

Analysis:

Employee表格包含公司里所有的员工,包括他们的经理。每个员工都有一个员工ID和一个经理ID。

给出Employee表格,写一个SQL语句,找出工资比他的经理还高的员工。例如在上面的例子中,只有Joe满足该情况。

最后给出什么则select后面接什么,如果遇到比较的,则应该选择使用两个表格。

Answer:

select e1.Name from Employee e1, Employee e2
where e2.Id = e1.ManagerId and e1.Salary > e2.Salary
 

DataBase -- Employees Earning More Than Their Managers My Submissions Question的更多相关文章

  1. LeeCode(Database)-Employees Earning More Than Their Managers

    The Employee table holds all employees including their managers. Every employee has an Id, and there ...

  2. [LeetCode] Employees Earning More Than Their Managers 员工挣得比经理多

    The Employee table holds all employees including their managers. Every employee has an Id, and there ...

  3. Leetcode 181. Employees Earning More Than Their Managers

    The Employee table holds all employees including their managers. Every employee has an Id, and there ...

  4. [SQL]LeetCode181. 超过经理收入的员工 | Employees Earning More Than Their Managers

    SQL架构 Create table If Not Exists Employee (Id ), Salary int, ManagerId int) Truncate table Employee ...

  5. 【SQL】181. Employees Earning More Than Their Managers

    The Employee table holds all employees including their managers. Every employee has an Id, and there ...

  6. LeetCode - Employees Earning More Than Their Managers

    Description: The Employee table holds all employees including their managers. Every employee has an ...

  7. 181. Employees Earning More Than Their Managers

    The Employee table holds all employees including their managers. Every employee has an Id, and there ...

  8. Employees Earning More Than Their Managers

    The Employee table holds all employees including their managers. Every employee has an Id, and there ...

  9. LeetCode——Employees Earning More Than Their Managers

    The Employee table holds all employees including their managers. Every employee has an Id, and there ...

随机推荐

  1. Flask之endpoint错误View function mapping is overwriting an existing endpoint function: ***

    最近在学习Flask, 其中遇到了一个错误, 发现这个问题和Flask, 路由有关系, 所以就记了下来 错误代码: from flask import Flask, render_template, ...

  2. memcached搭建

    MemCache 安装使用 安装memcached之前首先需要安装libevent, 如果没有安装的请自行去安装. 下载memcache http://www.memcached.org/files/ ...

  3. python-time模块、sys模块、os模块以及大量实例

    模块 通俗的说模块就把一个已经写好的带有可使用的函数的文件,通过文件名进行导入,然后调用里面的函数等来完成所需功能,模块封装了你需要实现功能的代码,使用者只需调用即可,简化代码量,缩短编程时间. ti ...

  4. Redis缓存数据库的安装与配置(2)

    1.为php安装redis客户端扩展 wget https://github.com/nicolasff/phpredis/archive/master.zip tar xf phpredis-mas ...

  5. Vijos 纸牌

    题目网址 https://vijos.org/d/Randle/p/5a0011e1d3d8a10a532d6d71 题目描述 在桌面上放着n张纸牌,每张纸牌有两面,每面都写着一个非负整数.你的邪王真 ...

  6. 嵌入式框架Zorb Framework搭建四:状态机的实现

    我是卓波,我是一名嵌入式工程师,我万万没想到我会在这里跟大家吹牛皮. 嵌入式框架Zorb Framework搭建过程 嵌入式框架Zorb Framework搭建一:嵌入式环境搭建.调试输出和建立时间系 ...

  7. (数据科学学习手札23)决策树分类原理详解&Python与R实现

    作为机器学习中可解释性非常好的一种算法,决策树(Decision Tree)是在已知各种情况发生概率的基础上,通过构成决策树来求取净现值的期望值大于等于零的概率,评价项目风险,判断其可行性的决策分析方 ...

  8. 数列分块入门 1 LOJ6277

    题目描述 给出一个长为 n 的数列,以及 n 个操作,操作涉及区间加法,单点查值. 输入格式 第一行输入一个数字 n. 第二行输入 n 个数字,第 iii 个数字为 a​i​​,以空格隔开. 接下来输 ...

  9. 汇编实验14:访问CMOS RAM

    汇编实验14:访问CMOS RAM 任务 编程,以“年/月/日 时:分:秒”的格式,显示当前的日期,时间. 预备知识 CMOS存储当前时间的信息:年.月.日.时.分.秒.这六个信息的长度均为1个字节, ...

  10. [转][赞]Android开发者必知的开发资源

    英文原文:Bongzimo  翻译: ImportNew-黄小非 随着Android平台市场份额的持续猛增 ,越来越多的开发者开始投入Android应用程序的开发大潮.如果您是一位2013年刚刚入行的 ...