前言

个人笔记，用于记录

MySQL

安装

	# 安装
	sudo apt-get install mysql-server
	# 初始化配置
	sudo mysql_secure_installation

服务启动关闭状态

1. 状态

	service mysql status

2. 启动/重启

	service mysql start/restart

3. 关闭

	 service mysql stop

修改配置

1. 连接，输入MySQL
2. 端口

	netstat -an|grep 3306
	vim /etc/mysql/mysql.conf.d/mysqld.cnf

3. plugin
   

	update user set plugin='mysql_native_password' where user='root';
	flush privileges;

4. authentication_string

	update user set authentication_string=password('root') where user='root';
	flush privileges;

5. 查看root用户的访问IP

	user mysql;
	select user,host from user where user='root';

6. 将其修改为任意IP可以访问，%

	use mysql;
	update user set host='%' where user='root' and host='localhost';

7. 下面是授予权限，如果出现其他主机无法连接的情况

	grant all privileges on *.* to root@'%' identified by 'root' with grant option;quit
	flush privileges;

8.0.x mysql 版本

1. 问题full_group_by

	# 解决方式
	cd /etc/mysql/mysql.conf.d
	vim mysqld.cnf
	在文件的【mysqld】下面加上一行，或者去掉已有的sql_mode=only_full_group_by
	改为
	sql_mode=
STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION