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1. 什么是索引?	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#1-%E4%BB%80%E4%B9%88%E6%98%AF%E7%B4%A2%E5%BC%95
2.索引是个什么样的数据结构呢?	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#2%E7%B4%A2%E5%BC%95%E6%98%AF%E4%B8%AA%E4%BB%80%E4%B9%88%E6%A0%B7%E7%9A%84%E6%95%B0%E6%8D%AE%E7%BB%93%E6%9E%84%E5%91%A2
3.Hash索引和B+树索引有什么区别或者说优劣呢?	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#3hash%E7%B4%A2%E5%BC%95%E5%92%8Cb%E6%A0%91%E7%B4%A2%E5%BC%95%E6%9C%89%E4%BB%80%E4%B9%88%E5%8C%BA%E5%88%AB%E6%88%96%E8%80%85%E8%AF%B4%E4%BC%98%E5%8A%A3%E5%91%A2
4.在建立索引的时候,都有哪些需要考虑的因素呢?	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#4%E5%9C%A8%E5%BB%BA%E7%AB%8B%E7%B4%A2%E5%BC%95%E7%9A%84%E6%97%B6%E5%80%99%E9%83%BD%E6%9C%89%E5%93%AA%E4%BA%9B%E9%9C%80%E8%A6%81%E8%80%83%E8%99%91%E7%9A%84%E5%9B%A0%E7%B4%A0%E5%91%A2
5.了解过哪些存储引擎？各有什么优缺点？	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#5%E4%BA%86%E8%A7%A3%E8%BF%87%E5%93%AA%E4%BA%9B%E5%AD%98%E5%82%A8%E5%BC%95%E6%93%8E%E5%90%84%E6%9C%89%E4%BB%80%E4%B9%88%E4%BC%98%E7%BC%BA%E7%82%B9
6.说一下什么是事务的ACID属性吧	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#6%E8%AF%B4%E4%B8%80%E4%B8%8B%E4%BB%80%E4%B9%88%E6%98%AF%E4%BA%8B%E5%8A%A1%E7%9A%84acid%E5%B1%9E%E6%80%A7%E5%90%A7
7.事务的隔离级别了解过吗？	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#7%E4%BA%8B%E5%8A%A1%E7%9A%84%E9%9A%94%E7%A6%BB%E7%BA%A7%E5%88%AB%E4%BA%86%E8%A7%A3%E8%BF%87%E5%90%97
8.说说InnoDB的索引原理	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#8%E8%AF%B4%E8%AF%B4innodb%E7%9A%84%E7%B4%A2%E5%BC%95%E5%8E%9F%E7%90%86
说说InnoDB的MVCC机制	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#%E8%AF%B4%E8%AF%B4innodb%E7%9A%84mvcc%E6%9C%BA%E5%88%B6
9.有了解过“回表”的概念吗？什么情况下会出现“回表”？	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#9%E6%9C%89%E4%BA%86%E8%A7%A3%E8%BF%87%E5%9B%9E%E8%A1%A8%E7%9A%84%E6%A6%82%E5%BF%B5%E5%90%97%E4%BB%80%E4%B9%88%E6%83%85%E5%86%B5%E4%B8%8B%E4%BC%9A%E5%87%BA%E7%8E%B0%E5%9B%9E%E8%A1%A8
10.MySQL索引的类型	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#10mysql%E7%B4%A2%E5%BC%95%E7%9A%84%E7%B1%BB%E5%9E%8B
11.有做过MySQL的索引优化吗	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#11%E6%9C%89%E5%81%9A%E8%BF%87mysql%E7%9A%84%E7%B4%A2%E5%BC%95%E4%BC%98%E5%8C%96%E5%90%97
12.什么是聚簇索引？	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#12%E4%BB%80%E4%B9%88%E6%98%AF%E8%81%9A%E7%B0%87%E7%B4%A2%E5%BC%95
13.InnoDB有聚簇索引吗？MyIsam呢？	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#13innodb%E6%9C%89%E8%81%9A%E7%B0%87%E7%B4%A2%E5%BC%95%E5%90%97myisam%E5%91%A2
14.MyIsam的数据是怎么存储的？	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#14myisam%E7%9A%84%E6%95%B0%E6%8D%AE%E6%98%AF%E6%80%8E%E4%B9%88%E5%AD%98%E5%82%A8%E7%9A%84
15.InnoDB的数据是怎么存储的？	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#15innodb%E7%9A%84%E6%95%B0%E6%8D%AE%E6%98%AF%E6%80%8E%E4%B9%88%E5%AD%98%E5%82%A8%E7%9A%84
16.InnoDB主键索引跟非主键索引在数据存储上的差异	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#16innodb%E4%B8%BB%E9%94%AE%E7%B4%A2%E5%BC%95%E8%B7%9F%E9%9D%9E%E4%B8%BB%E9%94%AE%E7%B4%A2%E5%BC%95%E5%9C%A8%E6%95%B0%E6%8D%AE%E5%AD%98%E5%82%A8%E4%B8%8A%E7%9A%84%E5%B7%AE%E5%BC%82
17.InnoDB删除某条记录后，内部会怎么处理？	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#17innodb%E5%88%A0%E9%99%A4%E6%9F%90%E6%9D%A1%E8%AE%B0%E5%BD%95%E5%90%8E%E5%86%85%E9%83%A8%E4%BC%9A%E6%80%8E%E4%B9%88%E5%A4%84%E7%90%86
18.InnoDB如果没有设置主键的话，它内部会怎么处理？	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#18innodb%E5%A6%82%E6%9E%9C%E6%B2%A1%E6%9C%89%E8%AE%BE%E7%BD%AE%E4%B8%BB%E9%94%AE%E7%9A%84%E8%AF%9D%E5%AE%83%E5%86%85%E9%83%A8%E4%BC%9A%E6%80%8E%E4%B9%88%E5%A4%84%E7%90%86
19.为什么InnoDB一定会生成主键？	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#19%E4%B8%BA%E4%BB%80%E4%B9%88innodb%E4%B8%80%E5%AE%9A%E4%BC%9A%E7%94%9F%E6%88%90%E4%B8%BB%E9%94%AE
20.MySQL分库分表了解过吗？	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#20mysql%E5%88%86%E5%BA%93%E5%88%86%E8%A1%A8%E4%BA%86%E8%A7%A3%E8%BF%87%E5%90%97
21.MySQL的redo日志和undo日志分别有什么用？	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#21mysql%E7%9A%84redo%E6%97%A5%E5%BF%97%E5%92%8Cundo%E6%97%A5%E5%BF%97%E5%88%86%E5%88%AB%E6%9C%89%E4%BB%80%E4%B9%88%E7%94%A8
22.MySQL的redo日志的刷盘时机	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#22mysql%E7%9A%84redo%E6%97%A5%E5%BF%97%E7%9A%84%E5%88%B7%E7%9B%98%E6%97%B6%E6%9C%BA
23.MySQL有哪些锁？以及各种锁的作用？	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#23mysql%E6%9C%89%E5%93%AA%E4%BA%9B%E9%94%81%E4%BB%A5%E5%8F%8A%E5%90%84%E7%A7%8D%E9%94%81%E7%9A%84%E4%BD%9C%E7%94%A8
24.MySQL中varchar与char的区别以及varchar(50)中的50代表的涵义	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#24mysql%E4%B8%ADvarchar%E4%B8%8Echar%E7%9A%84%E5%8C%BA%E5%88%AB%E4%BB%A5%E5%8F%8Avarchar50%E4%B8%AD%E7%9A%8450%E4%BB%A3%E8%A1%A8%E7%9A%84%E6%B6%B5%E4%B9%89
25.MySQL有哪些日志，分别是什么用处？	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#25mysql%E6%9C%89%E5%93%AA%E4%BA%9B%E6%97%A5%E5%BF%97%E5%88%86%E5%88%AB%E6%98%AF%E4%BB%80%E4%B9%88%E7%94%A8%E5%A4%84
26.在哪些情况下会发生针对该列创建了索引但是在查询的时候并没有使用呢?	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#26%E5%9C%A8%E5%93%AA%E4%BA%9B%E6%83%85%E5%86%B5%E4%B8%8B%E4%BC%9A%E5%8F%91%E7%94%9F%E9%92%88%E5%AF%B9%E8%AF%A5%E5%88%97%E5%88%9B%E5%BB%BA%E4%BA%86%E7%B4%A2%E5%BC%95%E4%BD%86%E6%98%AF%E5%9C%A8%E6%9F%A5%E8%AF%A2%E7%9A%84%E6%97%B6%E5%80%99%E5%B9%B6%E6%B2%A1%E6%9C%89%E4%BD%BF%E7%94%A8%E5%91%A2
27. 为什么要尽量设定一个主键?	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#27-%E4%B8%BA%E4%BB%80%E4%B9%88%E8%A6%81%E5%B0%BD%E9%87%8F%E8%AE%BE%E5%AE%9A%E4%B8%80%E4%B8%AA%E4%B8%BB%E9%94%AE
28.主键使用自增ID还是UUID?	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#28%E4%B8%BB%E9%94%AE%E4%BD%BF%E7%94%A8%E8%87%AA%E5%A2%9Eid%E8%BF%98%E6%98%AFuuid
29.字段为什么要求定义为not null?	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#29%E5%AD%97%E6%AE%B5%E4%B8%BA%E4%BB%80%E4%B9%88%E8%A6%81%E6%B1%82%E5%AE%9A%E4%B9%89%E4%B8%BAnot-null
30.如果要存储用户的密码散列,应该使用什么字段进行存储?	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#30%E5%A6%82%E6%9E%9C%E8%A6%81%E5%AD%98%E5%82%A8%E7%94%A8%E6%88%B7%E7%9A%84%E5%AF%86%E7%A0%81%E6%95%A3%E5%88%97%E5%BA%94%E8%AF%A5%E4%BD%BF%E7%94%A8%E4%BB%80%E4%B9%88%E5%AD%97%E6%AE%B5%E8%BF%9B%E8%A1%8C%E5%AD%98%E5%82%A8
31.varchar(10)和int(10)代表什么含义?	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#31varchar10%E5%92%8Cint10%E4%BB%A3%E8%A1%A8%E4%BB%80%E4%B9%88%E5%90%AB%E4%B9%89
32.MySQL的binlog有有几种录入格式?分别有什么区别?	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#32mysql%E7%9A%84binlog%E6%9C%89%E6%9C%89%E5%87%A0%E7%A7%8D%E5%BD%95%E5%85%A5%E6%A0%BC%E5%BC%8F%E5%88%86%E5%88%AB%E6%9C%89%E4%BB%80%E4%B9%88%E5%8C%BA%E5%88%AB
33.超大分页怎么处理?	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#33%E8%B6%85%E5%A4%A7%E5%88%86%E9%A1%B5%E6%80%8E%E4%B9%88%E5%A4%84%E7%90%86
34.关心过业务系统里面的sql耗时吗?统计过慢查询吗?对慢查询都怎么优化过?	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#34%E5%85%B3%E5%BF%83%E8%BF%87%E4%B8%9A%E5%8A%A1%E7%B3%BB%E7%BB%9F%E9%87%8C%E9%9D%A2%E7%9A%84sql%E8%80%97%E6%97%B6%E5%90%97%E7%BB%9F%E8%AE%A1%E8%BF%87%E6%85%A2%E6%9F%A5%E8%AF%A2%E5%90%97%E5%AF%B9%E6%85%A2%E6%9F%A5%E8%AF%A2%E9%83%BD%E6%80%8E%E4%B9%88%E4%BC%98%E5%8C%96%E8%BF%87
35.什么是存储过程？有哪些优缺点？	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#35%E4%BB%80%E4%B9%88%E6%98%AF%E5%AD%98%E5%82%A8%E8%BF%87%E7%A8%8B%E6%9C%89%E5%93%AA%E4%BA%9B%E4%BC%98%E7%BC%BA%E7%82%B9
36.说一说三个范式	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#36%E8%AF%B4%E4%B8%80%E8%AF%B4%E4%B8%89%E4%B8%AA%E8%8C%83%E5%BC%8F
37.什么情况下应不建或少建索引	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#37%E4%BB%80%E4%B9%88%E6%83%85%E5%86%B5%E4%B8%8B%E5%BA%94%E4%B8%8D%E5%BB%BA%E6%88%96%E5%B0%91%E5%BB%BA%E7%B4%A2%E5%BC%95
38.什么是表分区？	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#38%E4%BB%80%E4%B9%88%E6%98%AF%E8%A1%A8%E5%88%86%E5%8C%BA
39.表分区与分表的区别	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#39%E8%A1%A8%E5%88%86%E5%8C%BA%E4%B8%8E%E5%88%86%E8%A1%A8%E7%9A%84%E5%8C%BA%E5%88%AB
40.表分区有什么好处？	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#40%E8%A1%A8%E5%88%86%E5%8C%BA%E6%9C%89%E4%BB%80%E4%B9%88%E5%A5%BD%E5%A4%84
41.MVVC了解过吗	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#41mvvc%E4%BA%86%E8%A7%A3%E8%BF%87%E5%90%97
42.在MVCC并发控制中，读操作可以分成哪几类？	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#42%E5%9C%A8mvcc%E5%B9%B6%E5%8F%91%E6%8E%A7%E5%88%B6%E4%B8%AD%E8%AF%BB%E6%93%8D%E4%BD%9C%E5%8F%AF%E4%BB%A5%E5%88%86%E6%88%90%E5%93%AA%E5%87%A0%E7%B1%BB
43.行级锁定的优点	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#43%E8%A1%8C%E7%BA%A7%E9%94%81%E5%AE%9A%E7%9A%84%E4%BC%98%E7%82%B9
44.行级锁定的缺点	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#44%E8%A1%8C%E7%BA%A7%E9%94%81%E5%AE%9A%E7%9A%84%E7%BC%BA%E7%82%B9
45.MySQL优化	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#45mysql%E4%BC%98%E5%8C%96
46.key和index的区别	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#46key%E5%92%8Cindex%E7%9A%84%E5%8C%BA%E5%88%AB
47.delete、truncate、drop区别	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#47deletetruncatedrop%E5%8C%BA%E5%88%AB
48.MySQL主从复制原理流程	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#48mysql%E4%B8%BB%E4%BB%8E%E5%A4%8D%E5%88%B6%E5%8E%9F%E7%90%86%E6%B5%81%E7%A8%8B
49.自增主键最大ID记录，MyISAM和InnoDB分别是如何存储的	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#49%E8%87%AA%E5%A2%9E%E4%B8%BB%E9%94%AE%E6%9C%80%E5%A4%A7id%E8%AE%B0%E5%BD%95myisam%E5%92%8Cinnodb%E5%88%86%E5%88%AB%E6%98%AF%E5%A6%82%E4%BD%95%E5%AD%98%E5%82%A8%E7%9A%84
50.Mysql如何优化DISTINCT?	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#50mysql%E5%A6%82%E4%BD%95%E4%BC%98%E5%8C%96distinct
51.解释MySQL外连接、内连接与自连接的区别	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#51%E8%A7%A3%E9%87%8Amysql%E5%A4%96%E8%BF%9E%E6%8E%A5%E5%86%85%E8%BF%9E%E6%8E%A5%E4%B8%8E%E8%87%AA%E8%BF%9E%E6%8E%A5%E7%9A%84%E5%8C%BA%E5%88%AB
参考链接	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#%E5%8F%82%E8%80%83%E9%93%BE%E6%8E%A5
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#1-什么是索引
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#2索引是个什么样的数据结构呢
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#3hash索引和b树索引有什么区别或者说优劣呢
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#4在建立索引的时候都有哪些需要考虑的因素呢
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#5了解过哪些存储引擎各有什么优缺点
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#6说一下什么是事务的acid属性吧
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#7事务的隔离级别了解过吗
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#8说说innodb的索引原理
https://www.cnblogs.com/williamjie/p/11081081.html	https://www.cnblogs.com/williamjie/p/11081081.html
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#说说innodb的mvcc机制
https://baijiahao.baidu.com/s?id=1629409989970483292	https://baijiahao.baidu.com/s?id=1629409989970483292
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#9有了解过回表的概念吗什么情况下会出现回表
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#10mysql索引的类型
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#11有做过mysql的索引优化吗
https://blog.csdn.net/m0_37984616/article/details/81047676	https://blog.csdn.net/m0_37984616/article/details/81047676
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#12什么是聚簇索引
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#13innodb有聚簇索引吗myisam呢
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#14myisam的数据是怎么存储的
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#15innodb的数据是怎么存储的
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#16innodb主键索引跟非主键索引在数据存储上的差异
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#17innodb删除某条记录后内部会怎么处理
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#18innodb如果没有设置主键的话它内部会怎么处理
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#19为什么innodb一定会生成主键
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#20mysql分库分表了解过吗
https://baijiahao.baidu.com/s?id=1622441635115622194	https://baijiahao.baidu.com/s?id=1622441635115622194
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#21mysql的redo日志和undo日志分别有什么用
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#22mysql的redo日志的刷盘时机
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#23mysql有哪些锁以及各种锁的作用
https://blog.csdn.net/qq_40378034/article/details/90904573	https://blog.csdn.net/qq_40378034/article/details/90904573
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#24mysql中varchar与char的区别以及varchar50中的50代表的涵义
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#25mysql有哪些日志分别是什么用处
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#26在哪些情况下会发生针对该列创建了索引但是在查询的时候并没有使用呢
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#27-为什么要尽量设定一个主键
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#28主键使用自增id还是uuid
	https://camo.githubusercontent.com/926403ec639ebdb642a2145ced6e85d61c243151b2e032add65113fa5c4b7006/68747470733a2f2f696d67732e69747875657975616e2e636f6d2f3939303931332d32303139303830363039313431363731342d3738303935303033302e706e67
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#29字段为什么要求定义为not-null
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#30如果要存储用户的密码散列应该使用什么字段进行存储
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#31varchar10和int10代表什么含义
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#32mysql的binlog有有几种录入格式分别有什么区别
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#33超大分页怎么处理
	https://camo.githubusercontent.com/2c2cbcb83264d43b967c5144c045c7d7bec04e39bb1de84702f8d1bd4b16aa45/68747470733a2f2f696d67732e69747875657975616e2e636f6d2f3939303931332d32303139303830363039313433393534382d3830363439383133352e706e67
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#34关心过业务系统里面的sql耗时吗统计过慢查询吗对慢查询都怎么优化过
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#35什么是存储过程有哪些优缺点
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#36说一说三个范式
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#37什么情况下应不建或少建索引
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#38什么是表分区
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#39表分区与分表的区别
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#40表分区有什么好处
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#41mvvc了解过吗
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#42在mvcc并发控制中读操作可以分成哪几类
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#43行级锁定的优点
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#44行级锁定的缺点
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#45mysql优化
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#46key和index的区别
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#47deletetruncatedrop区别
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#48mysql主从复制原理流程
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#49自增主键最大id记录myisam和innodb分别是如何存储的
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#50mysql如何优化distinct
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#51解释mysql外连接内连接与自连接的区别
	https://github.com/hamfei/JavaInterview/blob/main/MySQL.md#参考链接
https://article.itxueyuan.com/eoJEMj	https://article.itxueyuan.com/eoJEMj
https://www.cnblogs.com/williamjie/p/11081592.html	https://www.cnblogs.com/williamjie/p/11081592.html
http://www.100mian.com/mianshi/mysql/49909.html	http://www.100mian.com/mianshi/mysql/49909.html
https://leisure.wang/procedural-framework/database/241.html	https://leisure.wang/procedural-framework/database/241.html
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