From 2235c527fce312229a077b77103e704e67a7fb4e Mon Sep 17 00:00:00 2001 From: mba1398 <26516464+mba1398@users.noreply.github.com> Date: Fri, 4 Feb 2022 14:19:48 +0800 Subject: [PATCH] Update README.md --- README.md | 85 ++++++++++++++++++++++++++++--------------------------- 1 file changed, 44 insertions(+), 41 deletions(-) diff --git a/README.md b/README.md index 59cb1c8..a64a8e7 100644 --- a/README.md +++ b/README.md @@ -12,69 +12,72 @@ Follow me，从 0 到 1 掌握 SQL，决胜秋招。 ## 目录 * ch00：绪论 - 环境搭建 - - [x] [1. MySQL 8.0 的安装](https://github.com/datawhalechina/team-learning-sql/blob/main/Task00%EF%BC%9A%E7%BB%AA%E8%AE%BA%20-%20%E7%8E%AF%E5%A2%83%E6%90%AD%E5%BB%BA.md#1-mysql-80-%E7%9A%84%E5%AE%89%E8%A3%85) - - [x] [2. 连接 MySQL 并执行 SQL 查询](https://github.com/datawhalechina/team-learning-sql/blob/main/Task00%EF%BC%9A%E7%BB%AA%E8%AE%BA%20-%20%E7%8E%AF%E5%A2%83%E6%90%AD%E5%BB%BA.md#2-%E8%BF%9E%E6%8E%A5-mysql-%E5%B9%B6%E6%89%A7%E8%A1%8C-sql-%E6%9F%A5%E8%AF%A2) + - [x] [1. MySQL 8.0 的安装](https://github.com/datawhalechina/wonderful-sql/blob/main/ch00:%20%E7%8E%AF%E5%A2%83%E6%90%AD%E5%BB%BA.md#1-mysql-80-%E7%9A%84%E5%AE%89%E8%A3%85) + - [x] [2. 连接 MySQL 并执行 SQL 查询](https://github.com/datawhalechina/wonderful-sql/blob/main/ch00:%20%E7%8E%AF%E5%A2%83%E6%90%AD%E5%BB%BA.md#2-%E8%BF%9E%E6%8E%A5-mysql-%E5%B9%B6%E6%89%A7%E8%A1%8C-sql-%E6%9F%A5%E8%AF%A2) * ch01：初识数据库 - - [x] [1.1 初识数据库](https://github.com/datawhalechina/team-learning-sql/blob/main/Task01%EF%BC%9A%E5%88%9D%E8%AF%86%E6%95%B0%E6%8D%AE%E5%BA%93.md#11-%E5%88%9D%E8%AF%86%E6%95%B0%E6%8D%AE%E5%BA%93) - - [x] [1.2 初识SQL](https://github.com/datawhalechina/team-learning-sql/blob/main/Task01%EF%BC%9A%E5%88%9D%E8%AF%86%E6%95%B0%E6%8D%AE%E5%BA%93.md#11-%E5%88%9D%E8%AF%86%E6%95%B0%E6%8D%AE%E5%BA%93) + - [x] [1.1 初识数据库](https://github.com/datawhalechina/wonderful-sql/blob/main/ch01:%20%E5%88%9D%E8%AF%86%E6%95%B0%E6%8D%AE%E5%BA%93.md#11-%E5%88%9D%E8%AF%86%E6%95%B0%E6%8D%AE%E5%BA%93) + - [x] [1.2 初识SQL](https://github.com/datawhalechina/wonderful-sql/blob/main/ch01:%20%E5%88%9D%E8%AF%86%E6%95%B0%E6%8D%AE%E5%BA%93.md#12-%E5%88%9D%E8%AF%86-sql) * ch02：基础查询与排序 - - [x] [2.1 SELECT语句基础](https://github.com/datawhalechina/team-learning-sql/blob/main/Task02%EF%BC%9A%E5%9F%BA%E7%A1%80%E6%9F%A5%E8%AF%A2%E4%B8%8E%E6%8E%92%E5%BA%8F.md#21-select%E8%AF%AD%E5%8F%A5%E5%9F%BA%E7%A1%80) - - [x] [2.2 算术运算符和比较运算符](https://github.com/datawhalechina/team-learning-sql/blob/main/Task02%EF%BC%9A%E5%9F%BA%E7%A1%80%E6%9F%A5%E8%AF%A2%E4%B8%8E%E6%8E%92%E5%BA%8F.md#22-%E7%AE%97%E6%9C%AF%E8%BF%90%E7%AE%97%E7%AC%A6%E5%92%8C%E6%AF%94%E8%BE%83%E8%BF%90%E7%AE%97%E7%AC%A6) - - [x] [2.3 逻辑运算符](https://github.com/datawhalechina/team-learning-sql/blob/main/Task02%EF%BC%9A%E5%9F%BA%E7%A1%80%E6%9F%A5%E8%AF%A2%E4%B8%8E%E6%8E%92%E5%BA%8F.md#23-%E9%80%BB%E8%BE%91%E8%BF%90%E7%AE%97%E7%AC%A6) - - [x] [2.4 对表进行聚合查询](https://github.com/datawhalechina/team-learning-sql/blob/main/Task02%EF%BC%9A%E5%9F%BA%E7%A1%80%E6%9F%A5%E8%AF%A2%E4%B8%8E%E6%8E%92%E5%BA%8F.md#24-%E5%AF%B9%E8%A1%A8%E8%BF%9B%E8%A1%8C%E8%81%9A%E5%90%88%E6%9F%A5%E8%AF%A2) - - [x] [2.5 对表进行分组](https://github.com/datawhalechina/team-learning-sql/blob/main/Task02%EF%BC%9A%E5%9F%BA%E7%A1%80%E6%9F%A5%E8%AF%A2%E4%B8%8E%E6%8E%92%E5%BA%8F.md#25-%E5%AF%B9%E8%A1%A8%E8%BF%9B%E8%A1%8C%E5%88%86%E7%BB%84) - - [x] [2.6 为聚合结果指定条件](https://github.com/datawhalechina/team-learning-sql/blob/main/Task02%EF%BC%9A%E5%9F%BA%E7%A1%80%E6%9F%A5%E8%AF%A2%E4%B8%8E%E6%8E%92%E5%BA%8F.md#26-%E4%B8%BA%E8%81%9A%E5%90%88%E7%BB%93%E6%9E%9C%E6%8C%87%E5%AE%9A%E6%9D%A1%E4%BB%B6) + - [x] [2.1 SELECT语句基础](https://github.com/datawhalechina/wonderful-sql/blob/main/ch02:%20%E5%9F%BA%E7%A1%80%E6%9F%A5%E8%AF%A2%E4%B8%8E%E6%8E%92%E5%BA%8F.md#21-select%E8%AF%AD%E5%8F%A5%E5%9F%BA%E7%A1%80) + - [x] [2.2 算术运算符和比较运算符](https://github.com/datawhalechina/wonderful-sql/blob/main/ch02:%20%E5%9F%BA%E7%A1%80%E6%9F%A5%E8%AF%A2%E4%B8%8E%E6%8E%92%E5%BA%8F.md#22-%E7%AE%97%E6%9C%AF%E8%BF%90%E7%AE%97%E7%AC%A6%E5%92%8C%E6%AF%94%E8%BE%83%E8%BF%90%E7%AE%97%E7%AC%A6) + - [x] [2.3 逻辑运算符](https://github.com/datawhalechina/wonderful-sql/blob/main/ch02:%20%E5%9F%BA%E7%A1%80%E6%9F%A5%E8%AF%A2%E4%B8%8E%E6%8E%92%E5%BA%8F.md#23-%E9%80%BB%E8%BE%91%E8%BF%90%E7%AE%97%E7%AC%A6) + - [x] [2.4 对表进行聚合查询](https://github.com/datawhalechina/wonderful-sql/blob/main/ch02:%20%E5%9F%BA%E7%A1%80%E6%9F%A5%E8%AF%A2%E4%B8%8E%E6%8E%92%E5%BA%8F.md#24-%E5%AF%B9%E8%A1%A8%E8%BF%9B%E8%A1%8C%E8%81%9A%E5%90%88%E6%9F%A5%E8%AF%A2) + - [x] [2.5 对表进行分组](https://github.com/datawhalechina/wonderful-sql/blob/main/ch02:%20%E5%9F%BA%E7%A1%80%E6%9F%A5%E8%AF%A2%E4%B8%8E%E6%8E%92%E5%BA%8F.md#25-%E5%AF%B9%E8%A1%A8%E8%BF%9B%E8%A1%8C%E5%88%86%E7%BB%84) + - [x] [2.6 为聚合结果指定条件](https://github.com/datawhalechina/wonderful-sql/blob/main/ch02:%20%E5%9F%BA%E7%A1%80%E6%9F%A5%E8%AF%A2%E4%B8%8E%E6%8E%92%E5%BA%8F.md#26-%E4%B8%BA%E8%81%9A%E5%90%88%E7%BB%93%E6%9E%9C%E6%8C%87%E5%AE%9A%E6%9D%A1%E4%BB%B6) * ch03：复杂一点的查询 - - [x] [3.1 视图](https://github.com/datawhalechina/team-learning-sql/blob/main/Task03%EF%BC%9A%E5%A4%8D%E6%9D%82%E4%B8%80%E7%82%B9%E7%9A%84%E6%9F%A5%E8%AF%A2.md#31-%E8%A7%86%E5%9B%BE) - - [x] [3.2 子查询](https://github.com/datawhalechina/team-learning-sql/blob/main/Task03%EF%BC%9A%E5%A4%8D%E6%9D%82%E4%B8%80%E7%82%B9%E7%9A%84%E6%9F%A5%E8%AF%A2.md#33-%E5%90%84%E7%A7%8D%E5%90%84%E6%A0%B7%E7%9A%84%E5%87%BD%E6%95%B0) - - [x] [3.3 各种各样的函数](https://github.com/datawhalechina/team-learning-sql/blob/main/Task03%EF%BC%9A%E5%A4%8D%E6%9D%82%E4%B8%80%E7%82%B9%E7%9A%84%E6%9F%A5%E8%AF%A2.md#33-%E5%90%84%E7%A7%8D%E5%90%84%E6%A0%B7%E7%9A%84%E5%87%BD%E6%95%B0) - - [x] [3.4 谓词](https://github.com/datawhalechina/team-learning-sql/blob/main/Task03%EF%BC%9A%E5%A4%8D%E6%9D%82%E4%B8%80%E7%82%B9%E7%9A%84%E6%9F%A5%E8%AF%A2.md#34-%E8%B0%93%E8%AF%8D) - - [x] [3.5 CASE 表达式](https://github.com/datawhalechina/team-learning-sql/blob/main/Task03%EF%BC%9A%E5%A4%8D%E6%9D%82%E4%B8%80%E7%82%B9%E7%9A%84%E6%9F%A5%E8%AF%A2.md#35-case-%E8%A1%A8%E8%BE%BE%E5%BC%8F) + - [x] [3.1 视图](https://github.com/datawhalechina/wonderful-sql/blob/main/ch03:%20%E5%A4%8D%E6%9D%82%E4%B8%80%E7%82%B9%E7%9A%84%E6%9F%A5%E8%AF%A2.md#31-%E8%A7%86%E5%9B%BE) + - [x] [3.2 子查询](https://github.com/datawhalechina/wonderful-sql/blob/main/ch03:%20%E5%A4%8D%E6%9D%82%E4%B8%80%E7%82%B9%E7%9A%84%E6%9F%A5%E8%AF%A2.md#32-%E5%AD%90%E6%9F%A5%E8%AF%A2) + - [x] [3.3 各种各样的函数](https://github.com/datawhalechina/wonderful-sql/blob/main/ch03:%20%E5%A4%8D%E6%9D%82%E4%B8%80%E7%82%B9%E7%9A%84%E6%9F%A5%E8%AF%A2.md#33-%E5%90%84%E7%A7%8D%E5%90%84%E6%A0%B7%E7%9A%84%E5%87%BD%E6%95%B0) + - [x] [3.4 谓词](https://github.com/datawhalechina/wonderful-sql/blob/main/ch03:%20%E5%A4%8D%E6%9D%82%E4%B8%80%E7%82%B9%E7%9A%84%E6%9F%A5%E8%AF%A2.md#34-%E8%B0%93%E8%AF%8D) + - [x] [3.5 CASE 表达式](https://github.com/datawhalechina/wonderful-sql/blob/main/ch03:%20%E5%A4%8D%E6%9D%82%E4%B8%80%E7%82%B9%E7%9A%84%E6%9F%A5%E8%AF%A2.md#35-case-%E8%A1%A8%E8%BE%BE%E5%BC%8F) * ch04：集合运算 - - [x] [4.1 表的加减法](https://github.com/datawhalechina/team-learning-sql/blob/main/Task04%EF%BC%9A%E9%9B%86%E5%90%88%E8%BF%90%E7%AE%97.md#41-%E8%A1%A8%E7%9A%84%E5%8A%A0%E5%87%8F%E6%B3%95) - - [x] [4.2 连结(JOIN)](https://github.com/datawhalechina/team-learning-sql/blob/main/Task04%EF%BC%9A%E9%9B%86%E5%90%88%E8%BF%90%E7%AE%97.md#42-%E8%BF%9E%E7%BB%93join) + - [x] [4.1 表的加减法](https://github.com/datawhalechina/wonderful-sql/blob/main/ch04:%20%E9%9B%86%E5%90%88%E8%BF%90%E7%AE%97.md#41-%E8%A1%A8%E7%9A%84%E5%8A%A0%E5%87%8F%E6%B3%95) + - [x] [4.2 连结(JOIN)](https://github.com/datawhalechina/wonderful-sql/blob/main/ch04:%20%E9%9B%86%E5%90%88%E8%BF%90%E7%AE%97.md#42-%E8%BF%9E%E7%BB%93join) * ch05：SQL高级处理 - - [x] [5.1 窗口函数](https://github.com/datawhalechina/team-learning-sql/blob/main/Task05%EF%BC%9ASQL%E9%AB%98%E7%BA%A7%E5%A4%84%E7%90%86.md#51-%E7%AA%97%E5%8F%A3%E5%87%BD%E6%95%B0) - - [x] [5.2 窗口函数种类](https://github.com/datawhalechina/team-learning-sql/blob/main/Task05%EF%BC%9ASQL%E9%AB%98%E7%BA%A7%E5%A4%84%E7%90%86.md#52-%E7%AA%97%E5%8F%A3%E5%87%BD%E6%95%B0%E7%A7%8D%E7%B1%BB) - - [x] [5.3 窗口函数的的应用 - 计算移动平均](https://github.com/datawhalechina/team-learning-sql/blob/main/Task05%EF%BC%9ASQL%E9%AB%98%E7%BA%A7%E5%A4%84%E7%90%86.md#53-%E7%AA%97%E5%8F%A3%E5%87%BD%E6%95%B0%E7%9A%84%E7%9A%84%E5%BA%94%E7%94%A8---%E8%AE%A1%E7%AE%97%E7%A7%BB%E5%8A%A8%E5%B9%B3%E5%9D%87) - - [x] [5.4 GROUPING运算符](https://github.com/datawhalechina/team-learning-sql/blob/main/Task05%EF%BC%9ASQL%E9%AB%98%E7%BA%A7%E5%A4%84%E7%90%86.md#54-grouping%E8%BF%90%E7%AE%97%E7%AC%A6) + - [x] [5.1 窗口函数](https://github.com/datawhalechina/wonderful-sql/blob/main/ch05:%20SQL%E9%AB%98%E7%BA%A7%E5%A4%84%E7%90%86.md#51-%E7%AA%97%E5%8F%A3%E5%87%BD%E6%95%B0) + - [x] [5.2 窗口函数种类](https://github.com/datawhalechina/wonderful-sql/blob/main/ch05:%20SQL%E9%AB%98%E7%BA%A7%E5%A4%84%E7%90%86.md#52-%E7%AA%97%E5%8F%A3%E5%87%BD%E6%95%B0%E7%A7%8D%E7%B1%BB) + - [x] [5.3 窗口函数的的应用 - 计算移动平均](https://github.com/datawhalechina/wonderful-sql/blob/main/ch05:%20SQL%E9%AB%98%E7%BA%A7%E5%A4%84%E7%90%86.md#53-%E7%AA%97%E5%8F%A3%E5%87%BD%E6%95%B0%E7%9A%84%E7%9A%84%E5%BA%94%E7%94%A8---%E8%AE%A1%E7%AE%97%E7%A7%BB%E5%8A%A8%E5%B9%B3%E5%9D%87) + - [x] [5.4 GROUPING运算符](https://github.com/datawhalechina/wonderful-sql/blob/main/ch05:%20SQL%E9%AB%98%E7%BA%A7%E5%A4%84%E7%90%86.md#54-grouping%E8%BF%90%E7%AE%97%E7%AC%A6) + - [x] [5.5 存储过程和函数](https://github.com/datawhalechina/wonderful-sql/blob/main/ch05:%20SQL%E9%AB%98%E7%BA%A7%E5%A4%84%E7%90%86.md#55-%E5%AD%98%E5%82%A8%E8%BF%87%E7%A8%8B%E5%92%8C%E5%87%BD%E6%95%B0) + - [x] [5.6 预处理声明 PREPARE Statement](https://github.com/datawhalechina/wonderful-sql/blob/main/ch05:%20SQL%E9%AB%98%E7%BA%A7%E5%A4%84%E7%90%86.md#56-%E9%A2%84%E5%A4%84%E7%90%86%E5%A3%B0%E6%98%8E-prepare-statement) * ch06：决胜秋招 - Section A - - [x] [练习一: 各部门工资最高的员工（难度：中等）](https://github.com/datawhalechina/team-learning-sql/blob/main/Task06%EF%BC%9A%E7%BB%BC%E5%90%88%E7%BB%83%E4%B9%A0.md#%E7%BB%83%E4%B9%A0%E4%B8%80-%E5%90%84%E9%83%A8%E9%97%A8%E5%B7%A5%E8%B5%84%E6%9C%80%E9%AB%98%E7%9A%84%E5%91%98%E5%B7%A5%E9%9A%BE%E5%BA%A6%E4%B8%AD%E7%AD%89) - - [x] [练习二: 换座位（难度：中等）](https://github.com/datawhalechina/team-learning-sql/blob/main/Task06%EF%BC%9A%E7%BB%BC%E5%90%88%E7%BB%83%E4%B9%A0.md#%E7%BB%83%E4%B9%A0%E4%BA%8C-%E6%8D%A2%E5%BA%A7%E4%BD%8D%E9%9A%BE%E5%BA%A6%E4%B8%AD%E7%AD%89) - - [x] [练习三: 分数排名（难度：中等）](https://github.com/datawhalechina/team-learning-sql/blob/main/Task06%EF%BC%9A%E7%BB%BC%E5%90%88%E7%BB%83%E4%B9%A0.md#%E7%BB%83%E4%B9%A0%E4%B8%89--%E5%88%86%E6%95%B0%E6%8E%92%E5%90%8D%E9%9A%BE%E5%BA%A6%E4%B8%AD%E7%AD%89) - - [x] [练习四：连续出现的数字（难度：中等）](https://github.com/datawhalechina/team-learning-sql/blob/main/Task06%EF%BC%9A%E7%BB%BC%E5%90%88%E7%BB%83%E4%B9%A0.md#%E7%BB%83%E4%B9%A0%E5%9B%9B%E8%BF%9E%E7%BB%AD%E5%87%BA%E7%8E%B0%E7%9A%84%E6%95%B0%E5%AD%97%E9%9A%BE%E5%BA%A6%E4%B8%AD%E7%AD%89) - - [x] [练习五：树节点 （难度：中等）](https://github.com/datawhalechina/team-learning-sql/blob/main/Task06%EF%BC%9A%E7%BB%BC%E5%90%88%E7%BB%83%E4%B9%A0.md#%E7%BB%83%E4%B9%A0%E4%BA%94%E6%A0%91%E8%8A%82%E7%82%B9-%E9%9A%BE%E5%BA%A6%E4%B8%AD%E7%AD%89) - - [x] [练习六：至少有五名直接下属的经理 （难度：中等）](https://github.com/datawhalechina/team-learning-sql/blob/main/Task06%EF%BC%9A%E7%BB%BC%E5%90%88%E7%BB%83%E4%B9%A0.md#%E7%BB%83%E4%B9%A0%E5%85%AD%E8%87%B3%E5%B0%91%E6%9C%89%E4%BA%94%E5%90%8D%E7%9B%B4%E6%8E%A5%E4%B8%8B%E5%B1%9E%E7%9A%84%E7%BB%8F%E7%90%86-%E9%9A%BE%E5%BA%A6%E4%B8%AD%E7%AD%89) - - [x] [练习七：查询回答率最高的问题 （难度：中等）](https://github.com/datawhalechina/team-learning-sql/blob/main/Task06%EF%BC%9A%E7%BB%BC%E5%90%88%E7%BB%83%E4%B9%A0.md#%E7%BB%83%E4%B9%A0%E5%85%AB%E6%9F%A5%E8%AF%A2%E5%9B%9E%E7%AD%94%E7%8E%87%E6%9C%80%E9%AB%98%E7%9A%84%E9%97%AE%E9%A2%98-%E9%9A%BE%E5%BA%A6%E4%B8%AD%E7%AD%89) - - [x] [练习八：各部门前3高工资的员工（难度：中等）](https://github.com/datawhalechina/team-learning-sql/blob/main/Task06%EF%BC%9A%E7%BB%BC%E5%90%88%E7%BB%83%E4%B9%A0.md#%E7%BB%83%E4%B9%A0%E4%B9%9D%E5%90%84%E9%83%A8%E9%97%A8%E5%89%8D3%E9%AB%98%E5%B7%A5%E8%B5%84%E7%9A%84%E5%91%98%E5%B7%A5%E9%9A%BE%E5%BA%A6%E4%B8%AD%E7%AD%89) - - [x] [练习九：平面上最近距离 (难度: 困难）](https://github.com/datawhalechina/team-learning-sql/blob/main/Task06%EF%BC%9A%E7%BB%BC%E5%90%88%E7%BB%83%E4%B9%A0.md#%E7%BB%83%E4%B9%A0%E5%8D%81%E5%B9%B3%E9%9D%A2%E4%B8%8A%E6%9C%80%E8%BF%91%E8%B7%9D%E7%A6%BB-%E9%9A%BE%E5%BA%A6-%E5%9B%B0%E9%9A%BE) - - [x] [练习十：行程和用户（难度：困难）](https://github.com/datawhalechina/team-learning-sql/blob/main/Task06%EF%BC%9A%E7%BB%BC%E5%90%88%E7%BB%83%E4%B9%A0.md#%E7%BB%83%E4%B9%A0%E5%8D%81%E4%B8%80%E8%A1%8C%E7%A8%8B%E5%92%8C%E7%94%A8%E6%88%B7%E9%9A%BE%E5%BA%A6%E5%9B%B0%E9%9A%BE) + - [x] [练习一: 各部门工资最高的员工（难度：中等）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch06:%20%E5%86%B3%E8%83%9C%E7%A7%8B%E6%8B%9B.md#%E7%BB%83%E4%B9%A0%E4%B8%80-%E5%90%84%E9%83%A8%E9%97%A8%E5%B7%A5%E8%B5%84%E6%9C%80%E9%AB%98%E7%9A%84%E5%91%98%E5%B7%A5%E9%9A%BE%E5%BA%A6%E4%B8%AD%E7%AD%89) + - [x] [练习二: 换座位（难度：中等）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch06:%20%E5%86%B3%E8%83%9C%E7%A7%8B%E6%8B%9B.md#%E7%BB%83%E4%B9%A0%E4%BA%8C-%E6%8D%A2%E5%BA%A7%E4%BD%8D%E9%9A%BE%E5%BA%A6%E4%B8%AD%E7%AD%89) + - [x] [练习三: 分数排名（难度：中等）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch06:%20%E5%86%B3%E8%83%9C%E7%A7%8B%E6%8B%9B.md#%E7%BB%83%E4%B9%A0%E4%B8%89--%E5%88%86%E6%95%B0%E6%8E%92%E5%90%8D%E9%9A%BE%E5%BA%A6%E4%B8%AD%E7%AD%89) + - [x] [练习四：连续出现的数字（难度：中等）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch06:%20%E5%86%B3%E8%83%9C%E7%A7%8B%E6%8B%9B.md#%E7%BB%83%E4%B9%A0%E5%9B%9B%E8%BF%9E%E7%BB%AD%E5%87%BA%E7%8E%B0%E7%9A%84%E6%95%B0%E5%AD%97%E9%9A%BE%E5%BA%A6%E4%B8%AD%E7%AD%89) + - [x] [练习五：树节点 （难度：中等）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch06:%20%E5%86%B3%E8%83%9C%E7%A7%8B%E6%8B%9B.md#%E7%BB%83%E4%B9%A0%E4%BA%94%E6%A0%91%E8%8A%82%E7%82%B9-%E9%9A%BE%E5%BA%A6%E4%B8%AD%E7%AD%89) + - [x] [练习六：至少有五名直接下属的经理 （难度：中等）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch06:%20%E5%86%B3%E8%83%9C%E7%A7%8B%E6%8B%9B.md#%E7%BB%83%E4%B9%A0%E5%85%AD%E8%87%B3%E5%B0%91%E6%9C%89%E4%BA%94%E5%90%8D%E7%9B%B4%E6%8E%A5%E4%B8%8B%E5%B1%9E%E7%9A%84%E7%BB%8F%E7%90%86-%E9%9A%BE%E5%BA%A6%E4%B8%AD%E7%AD%89) + - [x] [练习七：查询回答率最高的问题 （难度：中等）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch06:%20%E5%86%B3%E8%83%9C%E7%A7%8B%E6%8B%9B.md#%E7%BB%83%E4%B9%A0%E4%B8%83%E6%9F%A5%E8%AF%A2%E5%9B%9E%E7%AD%94%E7%8E%87%E6%9C%80%E9%AB%98%E7%9A%84%E9%97%AE%E9%A2%98-%E9%9A%BE%E5%BA%A6%E4%B8%AD%E7%AD%89) + - [x] [练习八：各部门前3高工资的员工（难度：中等）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch06:%20%E5%86%B3%E8%83%9C%E7%A7%8B%E6%8B%9B.md#%E7%BB%83%E4%B9%A0%E5%85%AB%E5%90%84%E9%83%A8%E9%97%A8%E5%89%8D3%E9%AB%98%E5%B7%A5%E8%B5%84%E7%9A%84%E5%91%98%E5%B7%A5%E9%9A%BE%E5%BA%A6%E4%B8%AD%E7%AD%89) + - [x] [练习九：平面上最近距离 (难度: 困难）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch06:%20%E5%86%B3%E8%83%9C%E7%A7%8B%E6%8B%9B.md#%E7%BB%83%E4%B9%A0%E4%B9%9D%E5%B9%B3%E9%9D%A2%E4%B8%8A%E6%9C%80%E8%BF%91%E8%B7%9D%E7%A6%BB-%E9%9A%BE%E5%BA%A6-%E5%9B%B0%E9%9A%BE) + - [x] [练习十：行程和用户（难度：困难）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch06:%20%E5%86%B3%E8%83%9C%E7%A7%8B%E6%8B%9B.md#%E7%BB%83%E4%B9%A0%E5%8D%81%E8%A1%8C%E7%A8%8B%E5%92%8C%E7%94%A8%E6%88%B7%E9%9A%BE%E5%BA%A6%E5%9B%B0%E9%9A%BE) - Section B - - [x] [练习一: 行转列（难度：中等））](https://github.com/datawhalechina/wonderful-sql/blob/main/ch07:%20%E7%A7%8B%E6%8B%9B%E7%A7%98%E7%B1%8D%20B.md#%E7%BB%83%E4%B9%A0%E4%B8%80%E8%A1%8C%E8%BD%AC%E5%88%97) - - [x] [练习二: 列转行（难度：中等）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch07:%20%E7%A7%8B%E6%8B%9B%E7%A7%98%E7%B1%8D%20B.md#%E7%BB%83%E4%B9%A0%E4%BA%8C%E5%88%97%E8%BD%AC%E8%A1%8C) - - [x] [练习三: 带货主播谁（难度：中等）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch07:%20%E7%A7%8B%E6%8B%9B%E7%A7%98%E7%B1%8D%20B.md#%E7%BB%83%E4%B9%A0%E4%B8%89%E5%B8%A6%E8%B4%A7%E4%B8%BB%E6%92%AD) - - [x] [练习四: MySQL 中如何查看sql语句的执行计划？可以看到哪些信息？（难度：中等）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch07:%20%E7%A7%8B%E6%8B%9B%E7%A7%98%E7%B1%8D%20B.md#%E7%BB%83%E4%B9%A0%E5%9B%9Bmysql-%E4%B8%AD%E5%A6%82%E4%BD%95%E6%9F%A5%E7%9C%8Bsql%E8%AF%AD%E5%8F%A5%E7%9A%84%E6%89%A7%E8%A1%8C%E8%AE%A1%E5%88%92%E5%8F%AF%E4%BB%A5%E7%9C%8B%E5%88%B0%E5%93%AA%E4%BA%9B%E4%BF%A1%E6%81%AF) - - [x] [练习五: 解释一下 SQL 数据库中 ACID 是指什么？（难度：中等）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch07:%20%E7%A7%8B%E6%8B%9B%E7%A7%98%E7%B1%8D%20B.md#%E7%BB%83%E4%B9%A0%E4%BA%94%E8%A7%A3%E9%87%8A%E4%B8%80%E4%B8%8B-sql-%E6%95%B0%E6%8D%AE%E5%BA%93%E4%B8%AD-acid-%E6%98%AF%E6%8C%87%E4%BB%80%E4%B9%88) + - [x] [练习一: 行转列（难度：中等））](https://github.com/datawhalechina/wonderful-sql/blob/main/ch06:%20%E5%86%B3%E8%83%9C%E7%A7%8B%E6%8B%9B.md#%E7%BB%83%E4%B9%A0%E4%B8%80%E8%A1%8C%E8%BD%AC%E5%88%97) + - [x] [练习二: 列转行（难度：中等）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch06:%20%E5%86%B3%E8%83%9C%E7%A7%8B%E6%8B%9B.md#%E7%BB%83%E4%B9%A0%E4%BA%8C%E5%88%97%E8%BD%AC%E8%A1%8C) + - [x] [练习三: 带货主播谁（难度：中等）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch06:%20%E5%86%B3%E8%83%9C%E7%A7%8B%E6%8B%9B.md#%E7%BB%83%E4%B9%A0%E4%B8%89%E5%B8%A6%E8%B4%A7%E4%B8%BB%E6%92%AD) + - [x] [练习四: MySQL 中如何查看sql语句的执行计划？可以看到哪些信息？（难度：中等）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch06:%20%E5%86%B3%E8%83%9C%E7%A7%8B%E6%8B%9B.md#%E7%BB%83%E4%B9%A0%E5%9B%9Bmysql-%E4%B8%AD%E5%A6%82%E4%BD%95%E6%9F%A5%E7%9C%8Bsql%E8%AF%AD%E5%8F%A5%E7%9A%84%E6%89%A7%E8%A1%8C%E8%AE%A1%E5%88%92%E5%8F%AF%E4%BB%A5%E7%9C%8B%E5%88%B0%E5%93%AA%E4%BA%9B%E4%BF%A1%E6%81%AF) + - [x] [练习五: 解释一下 SQL 数据库中 ACID 是指什么？（难度：中等）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch06:%20%E5%86%B3%E8%83%9C%E7%A7%8B%E6%8B%9B.md#%E7%BB%83%E4%B9%A0%E4%BA%94%E8%A7%A3%E9%87%8A%E4%B8%80%E4%B8%8B-sql-%E6%95%B0%E6%8D%AE%E5%BA%93%E4%B8%AD-acid-%E6%98%AF%E6%8C%87%E4%BB%80%E4%B9%88) - Section C - - [x] [练习一: 行转列（难度：中等）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch08:%20%E7%A7%8B%E6%8B%9B%E7%A7%98%E7%B1%8D%20C.md#%E7%BB%83%E4%B9%A0%E4%B8%80%E8%A1%8C%E8%BD%AC%E5%88%97) - - [x] [练习二: 列转行（难度：困难）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch08:%20%E7%A7%8B%E6%8B%9B%E7%A7%98%E7%B1%8D%20C.md#%E7%BB%83%E4%B9%A0%E4%BA%8C%E5%88%97%E8%BD%AC%E8%A1%8C) - - [x] [练习三: 连续登录（难度：困难）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch08:%20%E7%A7%8B%E6%8B%9B%E7%A7%98%E7%B1%8D%20C.md#%E7%BB%83%E4%B9%A0%E4%B8%89%E8%BF%9E%E7%BB%AD%E7%99%BB%E5%BD%95) - - [x] [练习四: hive 数据倾斜的产生原因及优化策略（难度：困难）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch08:%20%E7%A7%8B%E6%8B%9B%E7%A7%98%E7%B1%8D%20C.md#%E7%BB%83%E4%B9%A0%E5%9B%9Bhive-%E6%95%B0%E6%8D%AE%E5%80%BE%E6%96%9C%E7%9A%84%E4%BA%A7%E7%94%9F%E5%8E%9F%E5%9B%A0%E5%8F%8A%E4%BC%98%E5%8C%96%E7%AD%96%E7%95%A5) - + - [x] [练习一: 行转列（难度：中等）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch06:%20%E5%86%B3%E8%83%9C%E7%A7%8B%E6%8B%9B.md#%E7%BB%83%E4%B9%A0%E4%B8%80%E8%A1%8C%E8%BD%AC%E5%88%97-1) + - [x] [练习二: 列转行（难度：困难）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch06:%20%E5%86%B3%E8%83%9C%E7%A7%8B%E6%8B%9B.md#%E7%BB%83%E4%B9%A0%E4%BA%8C%E5%88%97%E8%BD%AC%E8%A1%8C-1) + - [x] [练习三: 连续登录（难度：困难）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch06:%20%E5%86%B3%E8%83%9C%E7%A7%8B%E6%8B%9B.md#%E7%BB%83%E4%B9%A0%E4%B8%89%E8%BF%9E%E7%BB%AD%E7%99%BB%E5%BD%95) + - [x] [练习四: hive 数据倾斜的产生原因及优化策略（难度：困难）](https://github.com/datawhalechina/wonderful-sql/blob/main/ch06:%20%E5%86%B3%E8%83%9C%E7%A7%8B%E6%8B%9B.md#%E7%BB%83%E4%B9%A0%E4%B8%89%E8%BF%9E%E7%BB%AD%E7%99%BB%E5%BD%95) + - [x] [练习五: LEFT JOIN 是否可能会出现多出的行？为什么？](https://github.com/datawhalechina/wonderful-sql/blob/main/ch06:%20%E5%86%B3%E8%83%9C%E7%A7%8B%E6%8B%9B.md#%E7%BB%83%E4%B9%A0%E4%BA%94left-join-%E6%98%AF%E5%90%A6%E5%8F%AF%E8%83%BD%E4%BC%9A%E5%87%BA%E7%8E%B0%E5%A4%9A%E5%87%BA%E7%9A%84%E8%A1%8C%E4%B8%BA%E4%BB%80%E4%B9%88) + - [x] [附加题: 写一写本次学习的收获。](https://github.com/datawhalechina/wonderful-sql/blob/main/ch06:%20%E5%86%B3%E8%83%9C%E7%A7%8B%E6%8B%9B.md#%E5%86%99%E4%B8%80%E5%86%99%E6%9C%AC%E6%AC%A1%E5%AD%A6%E4%B9%A0%E7%9A%84%E6%94%B6%E8%8E%B7) ## 常见问题