学习MySQL笔记(1)
前提:
数据库安装目录为：E:\work2\MySQL\db;root用户的密码为：userpassword
1、进入mysql的编辑页面：
在dos系统中进入E:\work2\MySQL\db\bin目录下，
C:\Documents and Settings\hjh>e: E:\>cd "E:\work2\MySQL\db\bin"
E:\work2\MySQL\db\bin>
用root用户登录，输入命令: mysql -uroot -p 回车
然后再Enter password: 后面输入密码：userpassword 回车
最后就进入MySQL的编辑页面。
E:\work2\MySQL\db\bin>mysql -uroot -p Enter password: *********** Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 16 Server version: 5.1.24-rc-community MySQL Community Server (GPL) Type 'help;' or '\h' for help. Type '\c' to clear the buffer. mysql>
2、显示所有的数据库： show databases;
mysql> show databases; +--------------------+ | Database | +--------------------+ | information_schema | | abccs | | mysql | +--------------------+ 3 rows in set (0.00 sec) mysql>
3、进入某个数据库(如mysql--- )：use mysql;
mysql> use mysql; Database changed mysql>
4、在进入某个数据库后，显示它的所有表：show tables;
mysql> use mysql; Database changed mysql> show tables; +---------------------------+ | Tables_in_mysql | +---------------------------+ | columns_priv | | db | | event | | func | | general_log | | help_category | | help_keyword | | help_relation | | help_topic | | host | | plugin | | proc | | procs_priv | | slow_log | | tables_priv | | time_zone | | time_zone_leap_second | | time_zone_name | | time_zone_transition | | time_zone_transition_type | | user | +---------------------------+ 21 rows in set (0.06 sec) mysql>
5、修改root用户的密码：
(1)、进入到E:\work2\MySQL\db\bin目录下，
D:\work2\db\bin>
输入： mysqladmin -uroot -p password 新密码
D:\work2\db\bin>mysqladmin -uroot -p password test1 Enter password:
test1 是新密码，在Enter password：后面输入原密码userpassword
D:\work2\db\bin>mysqladmin -uroot -p password test1 Enter password: ******** D:\work2\db\bin>
用新密码登录验证是否修改成功：
D:\work2\db\bin>mysql -uroot -p Enter password: ***** Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 12 Server version: 5.1.24-rc-community MySQL Community Server (GPL) Type 'help;' or '\h' for help. Type '\c' to clear the buffer. mysql>
(2)、进入MySQL
D:\work2\db\bin>mysql -uroot -p Enter password: ***** Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 12 Server version: 5.1.24-rc-community MySQL Community Server (GPL) Type 'help;' or '\h' for help. Type '\c' to clear the buffer. mysql>
进入mysql数据库，
然后运行：UPDATE user SET Password=PASSWORD(’new_password’) WHERE user=’root’;
mysql> use mysql; Database changed mysql> UPDATE user SET Password=PASSWORD('test1') WHERE user='root'; Query OK, 0 rows affected (0.00 sec) Rows matched: 2 Changed: 0 Warnings: 0 mysql>
最后运行：FLUSH PRIVILEGES;
mysql> use mysql; Database changed mysql> UPDATE user SET Password=PASSWORD('test1') WHERE user=’root’; ERROR 1300 (HY000): Invalid utf8 character string: '’root’' mysql> use mysql; Database changed mysql> UPDATE user SET Password=PASSWORD('test1') WHERE user='root'; Query OK, 0 rows affected (0.00 sec) Rows matched: 2 Changed: 0 Warnings: 0 mysql> FLUSH PRIVILEGES; ERROR 1146 (42S02): Table 'mysql.servers' doesn't exist mysql>
6、创建数据库并且创建对新数据库有所有权限的账户
使用root账户进入MySQL后，
若数据库aaa存在，则删除： DROP DATABASE IF EXISTS aaa;
D:\work2\db\bin>mysql -uroot -p Enter password: ******** Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 22 Server version: 5.1.24-rc-community MySQL Community Server (GPL) Type 'help;' or '\h' for help. Type '\c' to clear the buffer. mysql> DROP DATABASE IF EXISTS aaa; Query OK, 0 rows affected, 1 warning (0.00 sec) mysql>
创建数据库aaa,并设置数据库的运行的语言是utf8: CREATE DATABASE IF NOT EXISTS aaa CHARACTER SET utf8;
mysql> CREATE DATABASE IF NOT EXISTS aaa CHARACTER SET utf8; Query OK, 1 row affected (0.00 sec) mysql>
创建账户test_user:GRANT ALL PRIVILEGES ON aaa .* TO 'test_user'@'localhost' IDENTIFIED BY 'testpassword' WITH GRANT OPTION;
ALL PRIVILEGES --- 表示所有权限
'test_user'@'localhost' --- 表示主机上的test_user用户
testpassword --- 是密码
mysql> GRANT ALL PRIVILEGES ON aaa .* TO 'test_user'@'localhost' IDENTIFIED BY 'testpassword' WITH GRANT OPTION; Query OK, 0 rows affected (0.00 sec) mysql> GRANT ALL PRIVILEGES ON UniMonDB.* TO 'test_user'@'%' IDENTIFIED BY 'testpassword' WITH GRANT OPTION; Query OK, 0 rows affected (0.00 sec) mysql>
然后再创建非本机的账户test_user：GRANT ALL PRIVILEGES ON UniMonDB.* TO 'test_user'@'%' IDENTIFIED BY 'testpassword' WITH GRANT OPTION;
ALL PRIVILEGES --- 表示所有权限
'test_user'@'localhost' --- 表示非主机上的test_user用户
testpassword --- 是密码
mysql> GRANT ALL PRIVILEGES ON aaa .* TO 'test_user'@'localhost' IDENTIFIED BY 'testpassword' WITH GRANT OPTION;
Query OK, 0 rows affected (0.00 sec) mysql> GRANT ALL PRIVILEGES ON UniMonDB.* TO 'test_user'@'%' IDENTIFIED BY 'testpassword' WITH GRANT OPTION; Query OK, 0 rows affected (0.00 sec) mysql>