参考链接如下：
https://www.jianshu.com/p/4fc53d7d7620
一、安装
1、执行安装命令
brew install mysql
2、安装完后启动mysql
mysql.server start
3、执行安全设置
mysql_secure_installation
显示如下
There are three levels of password validation policy:
LOW Length >= 8
MEDIUM Length >= 8, numeric, mixed case, and special characters
STRONG Length >= 8, numeric, mixed case, special characters and dictionary file
按照提示选择密码等级，并设置root密码
二、创建新的数据库、用户并授权
1、登录mysql
mysql -u root -p
按提示输入root密码
root@poksi-test-2019:~# mysql -u root -p
Enter password:
2、创建数据库
create database retail_db character set utf8mb4;
3、创建用户
create user ‘retail_u’@’%’ identified by ‘retail_PWD_123’;
4、授权用户
grant all privileges on retail_db.* to ‘retail_u’@’%’;
flush privileges;
5、查看当前的数据库
show databases;
6、显示当前数据库的表单
show tables
三、建表
CREATE TABLE t_user(
key_id VARCHAR(255) NOT NULL PRIMARY KEY, – id 统一命名为key_id
user_name VARCHAR(255) NOT NULL ,
password VARCHAR(255) NOT NULL ,
phone VARCHAR(255) NOT NULL,
deleted INT NOT NULL DEFAULT 0, – 逻辑删除标志默认值
create_time timestamp NULL default CURRENT_TIMESTAMP, – 创建时间默认值
update_time timestamp NULL default CURRENT_TIMESTAMP – 修改时间默认值
) ENGINE=INNODB AUTO_INCREMENT=1000 DEFAULT CHARSET=utf8mb4;
四、检查mysql服务状态
先退出mysql命令行，输入命令
systemctl status mysql.service
显示如下结果说明mysql服务是正常的
● mysql.service - MySQL Community Server
Loaded: loaded (/lib/systemd/system/mysql.service; enabled; vendor preset: enabled)
Active: active (running) since Wed 2019-05-22 10:53:13 CST; 13min ago
Main PID: 16686 (mysqld)
Tasks: 29 (limit: 4667)
CGroup: /system.slice/mysql.service
└─16686 /usr/sbin/mysqld --daemonize --pid-file=/run/mysqld/mysqld.pid
May 22 10:53:12 poksi-test-2019 systemd[1]: Starting MySQL Community Server…
May 22 10:53:13 poksi-test-2019 systemd[1]: Started MySQL Community Server.
五 命令
查看mysql启动端口号：show global variables like ‘port’;
查看mysql安装版本：status
查看数据库：show database;
新建数据库：CREATE DATABASE library;
使用数据库：use library;
mysql 查看当前数据库是哪个：select database();