create database db_admin;
use db_admin;
create table tb_admin(
    id int auto_increment primary key,
    user varchar(30) not null,
    password varchar(30) not null,
    createtime datetime default current_timestamp,
    email varchar(50) not null)
	default charset=utf8;
	
insert into tb_admin (user,password,email) values('张三','12345','zh@sina.com.cn');

select * from tb_admin;