标签:ext ase class create 存在 tables logs esc ble
show databases;
use 数据库名;
show tables;
describe 表名;
SELECT * FROM 表名
create databse 库名;
create table 表名 (字段设定列表); mysql> create table name( -> id int auto_increment not null primary key , -> uname char(8), -> gender char(2), -> birthday date ); Query OK, 0 rows affected (0.03 sec) mysql> show tables; +------------------+ | Tables_in_userdb | +------------------+ | name | +------------------+ 1 row in set (0.00 sec) mysql> describe name; +----------+---------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +----------+---------+------+-----+---------+----------------+ | id | int(11) | NO | PRI | NULL | auto_increment | | uname | char(8) | YES | | NULL | | | gender | char(2) | YES | | NULL | | | birthday | date | YES | | NULL | | +----------+---------+------+-----+---------+----------------+ 4 rows in set (0.00 sec) 注: auto_increment 自增 primary key 主键
insert into name(uname,gender,birthday) values(‘张三‘,‘男‘,‘1971-10-01‘);
update name set birthday=‘1971-01-10‘ where uname=‘张三‘;
delete from name where uname=‘张三‘;
drop table 表名
drop database 库名;
mysqldump -u root -p --opt 数据库名>备份名; //进入到库目录
mysql -u root -p 数据库名<备份名; //恢复时数据库必须存在,可以为空数据库
格式:grant select on 数据库.* to 用户名@登录主机 identified by "密码"
例1、增加一个用户user001密码为123456,让他可以在任何主机上登录,并对所有数据库有查询、插入、修改、删除的权限。首先用以root用户连入MySQL,然后键入以下命令:
mysql> grant select,insert,update,delete on *.* to user001@"%" Identified by "123456";
例2、增加一个用户user002密码为123456,让此用户只可以在localhost上登录,也可以设置指定IP,并可以对数据库test进行查询、插入、修改、删除的操作 (localhost指本地主机,即MySQL数据库所在的那台主机)
//这样用户即使用知道user_2的密码,他也无法从网上直接访问数据库,只能通过MYSQL主机来操作test库。
//首先用以root用户连入MySQL,然后键入以下命令:
mysql>grant select,insert,update,delete on test.* to user002@localhost identified by "123456";
标签:ext ase class create 存在 tables logs esc ble
原文地址:http://www.cnblogs.com/kaola8023/p/6993267.html