关于mysql的一些基本操作

--创建用户

create user "aaaa"@"localhost" identified by "aaaa";

--查询数据库

show databases;

--使用数据库

use mysql;

--查询表

show tables;

-- 查询用户

select user from user

--修改密码

set password for "aaaa"@"localhost" =PASSWORD("123456");

-- 授权操作

grant insert,update on *.* to "aaaa"@"localhost";

--删除用户

drop user "aaaa"@"localhost";

--登录用户

mysql -u root -p;

--创建数据库
create database xxx;
--删除数据库
delete database xxx;
--创建表
create table student(
id int unsigned not null primary key auto_increment,
name char(10) not null,
age tinyint unsigned not null);

--查看表结构
describe student;

--修改表
alter table student add birthday date;
alter table student drop id;
alter table student add id int unsigned not null primary key auto_increment;
alter table student add tel char(11) default "-";
alter table student rename stu;

--插入数据
insert into stu (name,age,birthday,id,tel)values("zhangsan",18,"2000-1-8",1,"12345678900");
insert into stu (name,age,birthday,id)values("tmh",20,"1998-10-21",2);
insert into stu values("tjx",11,"2007-09-13",3,"15195862719"),("tjx",9,"2009-6-6",4,"18550677518");

--删除表
drop table stu;

--查询表中数据
select * from stu;
select name from stu where id > 2;