linux安装mysql

基础概念

dql -select
dml -insert update delete
ddl -create table create view
dcl -grant

安装步骤（centos7）

• sudo yum install mysql mysql-server
  sudo yum -y install mysql-server(centos6)
• sudo vim /etc/my.cnf
• 修改文件增加，default-character-set = utf8
• 启动mysql
  systemctl start mysqld

centos6启动
service mysqld start

• 设置随系统启动
  systemctl enable mysqld
  systemctl daemon-reload

centos6中设置随系统启动
sudo chkconfig mysqld on
sudo chkconfig --list mysqld

• 登录mysql
  mysql -u root

• 查看用户
  select user,host from mysql.user;

• 删除匿名用户
  delete from mysql.user where user='';

• 刷新权限
  flush privileges;

• 防火墙开放3306端口
  sudo vim /etc/sysconfig/iptables
  -A INPUT -p tcp -m tcp --dport 3306 -j ACCEPT

• 重启防火墙
  sudo systemctl restart iptables.service
  sudo service iptables restart(centos6)

• 新建用户(7会报错，原因未知)
  insert into mysql.user(Host,User,Password) values("localhost","qinxianyun",password("qinxianyun"));

• 创建数据库(是数字键1左边的小点，用单引号会报错) create databasemmall` default character set utf8 collate utf8_general_ci;

• 查看权限
  select * from mysql.user \G

• 授权
  grant all privileges on mmall.* to qinxianyun@'%' identified by 'qinxianyun' with grant option;

• 为root用户设置密码
  set password for root@localhost=password('admin123');
  set password for root@127.0.0.1=password('admin123');
  select user,host,password from mysql.user;
  set password for root@localhost.localdomain=password('admin123');

• 授权远程访问（能访问可以不设置）
  use mysql;
  grant all privileges on . to root@'%' identified by "root";
  FLUSH RIVILEGES;