cmd 安装mysql

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http://www.runoob.com/mysql/mysql-install.html  （cmd）Aa410766383    mysql  password

bin目录下： net start mysql  启动mysql
mysql -u root -p  打开mysql
输入mysql密码：+9C5toB#1IBm

改变密码
alter user 'root'@'localhost' identified by '123456'; 

结束确认改变

flush privileges;

退出mysql>      exit

show databases;   //查看所有数库

create database li_ying;  创建库

use li_ying;  进入库

create table user(name varchar(20),age varchar(10));  创建一个用户表