MySql 安装及实用笔记

安装

更新 rpm 包

rpm -Uvh http://repo.mysql.com//mysql57-community-release-el7-7.noarch.rpm

安装MySql

yum -y install mysql-community-server

启动 MySql 并设置为开机自启动服务

systemctl enable mysqld
systemctl start mysqld

检查 MySql 服务状态

systemctl status mysqld

修改 MySql 初始密码

第一次启动mysql，会在日志文件中生成root用户的一个随机密码，使用下面命令查看该密码

grep 'temporary password' /var/log/mysqld.log

修改root用户密码

使用刚刚的临时密码登录后，修改密码

# mysql -u root -p -h localhost
Enter password:
 
mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '1lin24QWE!@#';

实用笔记

连接mysql

命令行
sqlalchemy

mysql+pymysql://user:pwd@url:port/db_name

操作数据库

查看数据库

SHOW DATABASES;

选择数据库

USE db_name;

创建数据库

CREATE DATABASE `db_name` DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;

删除数据库

DROP DATABASE db_name;

操作表

查看表

SHOW TABLES;

查看表结构

DESC table_name;

退出MySql

exit

用户与权限管理

用户相关文章
- 1
- 2

笔记

查看用户信息

use mysql;
select user,host,password from user;

查看用户权限

// 查看 user_name 在 host 下的权限
// host_address取值 ip/localhost/%
show grants for user_name@host_address; 
show grants for user_name;      //没有指定host则表示%

创建用户

create user user_name@host_address identified by 'password'; // 不指定host为%

例子：
create user lxp@localhost identified by 'lxps_password';
create user lxp@106.15.188.215 identified by 'lxps_password';

修改用户密码

set password for user_name@'host_address'=password('pwd');
flush privileges;
-- -----------------或者------------------
update user set password=password('iamsuperman') where user='superboy';
flush privileges;

删除用户
- delete from user where user='user_name' and host='host_address'
- DROP USER username@localhost;
用户权限管理

grant all on db_name.* to user_name@host_address identified by 'pwd';
flush privileges; // 一定要刷新权限

-- 赋予部分权限，其中的shopping.*表示对以shopping所有文件操作。
grant select,delete,update,insert on simpleshop.* to superboy@'localhost' identified by 'superboy';
flush privileges;

-- 赋予所有权限
grant all privileges on simpleshop.* to superboy@localhost identified by 'iamsuperboy';
flush privileges;

-- 撤销update权限
revoke update on simpleshop.* from superboy@localhost;

-- 撤销所有权限
revoke all on simpleshop.* from superboy@localhost;