MYSQL常用命令

MySQL常用命令

1. 创建数据库

create database name;

2. 选择数据库

use databasename;

3. 删除数据库

drop database name;

drop database if exists name;

4. 显示数据库中的表

show tables;

5. 显示表头

desc tablename;

6. select去除重复字段

select distinct colname from tablename;

7. 删除表

drop table tablename;

8. 将表中的数据清空

delete from tablename;

9. 显示表中的记录

select * from tablename;

10. 建表

create table tablename

(

id int(3) auto_increment not null primary key,

name char(10) not null,

address varchar(50) default 'shenzhen',

year date

);

11. 插入数据

insert into tablename values('', 'test', 'test', '2000-01-01');

insert into tablename(name, address, year) values('test', 'test', '2000-01-01');

12. 创建一个超级用户

mysql> grant all privileges on *.* to user@localhost identified by 'password' with grant option;

13. 增加新用户

mysql> grant select on database.* to username@host identified by "password";

example:

mysql> grant all privileges on *.* to test@localhost identified by 'test' with grant option;

mysql> grant all privileges on *.* to test@"%" identified by 'test' with grant option;

14. 删除授权

mysql> revoke all privileges on *.* from root@"%";

mysql> delete from user where user="root" and host="%";

mysql> flush privileges;

15. 创建一个custom在特定的客户端登陆，可访问特定数据库test

mysql> grant select, insert, update, delete, create, drop on test.* to custom@test.com identified by 'password';

16. 重命名表

mysql> alter table t1 rename t2;

17. 备份数据库

bash# mysqldump -h host -u root -p dbname > dbname_backup.sql

18. 恢复数据库

bash# mysqladmin -h myhost -u root -p create dbname