MySQL entry of common commands
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1, connect Mysql
Format: mysql -h host address -u user name -p User password
1, is connected to the machine on MYSQL.(Mysql must first set the environment variable)
mysql -u root -p
Just installed MYSQL, root has no password, so you can directly enter into the MYSQL
After the successful landing is shown below:
mysql>
2, exit MYSQL command: exit
2, change passwords
Format: mysqladmin -u username -p password old password new password
Suppose username: root Old Password: xingly new password: xingly.cn
mysqladmin -u root -p xingly password xingly.cn
NOTE: The following commands need to add; (semicolon), analog C / Java Bar
Remember that on the line, do not ask why!
3, add new users
Format: grant select on database * to username @ log on the host identified by "password."
1, add a user: test1, password: abc, get the highest authority - can operate on all databasesVery not recommend this
grant select,insert,update,delete on . to [email=test1@”%]test1@”%[/email]” Identified by “abc”;
2. Add a user: test1, password: abc, get all the permissions - you can only operate a local server
grant select,insert,update,delete on mydb.* to [email=test2@localhost]test2@localhost[/email] identified by “abc”;
4.1 Creating a database
命令：create database <数据库名>
例1：建立一个名为xingly的数据库
create database xingly;
4.2 显示数据库
命令：show databases （注意：最后有个s）
mysql>show databases
注意：为了不再显示的时候乱码，要修改数据库默认编码。以下以UTF-8编码页面为例进行说明：
修改MYSQL的配置文件：my.ini里面修改default-character-set=utf-8
4.3 删除数据库
命令：drop database <数据库名>
例如：删除名为xingly的数据库
mysql> drop database xingly;
4.4 连接数据库
命令： use <数据库名>
例如：这里使用名为：xingly的数据库
mysql> use xingly;
屏幕提示：Database changed 就连接成功了
4.5 当前选择的数据库
命令：mysql> select database();
1.显示MYSQL的版本
mysql> select version();
2.显示当前时间
mysql> select now();
3.显示字符串
mysql> SELECT “welecome to my CSDN-blog!”;
4.当计算器用
select ((4 * 4) / 10 ) + 25;
5、备份数据库
命令：mysqldump -u 用户名 -p 数据库名 > 导出的文件名
1.导出整个数据库—导出文件默认是存在mysql\bin目录下
mysqldump -u user_name -p123456 database_name > xingly.sql
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