MySQL基本管理和应用

# yum install mysql-server

# /etc/init.d/mysqld start
Initializing MySQL database: Installing MySQL system tables...
OK
Filling help tables...
OK

To start mysqld at boot time you have to copy
support-files/mysql.server to the right place for your system

PLEASE REMEMBER TO SET A PASSWORD FOR THE MySQL root USER !
To do so, start the server, then issue the following commands:

/usr/bin/mysqladmin -u root password ‘new-password‘
/usr/bin/mysqladmin -u root -h CentOS1.eric.com password ‘new-password‘

Alternatively you can run:
/usr/bin/mysql_secure_installation

which will also give you the option of removing the test
databases and anonymous user created by default. This is
strongly recommended for production servers.

See the manual for more instructions.

You can start the MySQL daemon with:
cd /usr ; /usr/bin/mysqld_safe &

You can test the MySQL daemon with mysql-test-run.pl
cd /usr/mysql-test ; perl mysql-test-run.pl

Please report any problems with the /usr/bin/mysqlbug script!

============================================================================================================================================
# mysqladmin -u root password ‘password‘
# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.1.61 Source distribution

Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.

mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| test |
+--------------------+
3 rows in set (0.00 sec)

mysql> create database wordpress;
Query OK, 1 row affected (0.02 sec)

mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| test |
| wordpress |
+--------------------+
4 rows in set (0.00 sec)
mysql> GRANT ALL PRIVILEGES ON *.* to ‘wordpress‘@‘localhost‘ IDENTIFIED BY ‘wordpress‘ WITH GRANT OPTION;
Query OK, 0 rows affected (0.00 sec)

mysql> create database bank;
Query OK, 1 row affected (0.00 sec)

mysql> create database shop;
Query OK, 1 row affected (0.00 sec)

mysql> create database hospital;
Query OK, 1 row affected (0.01 sec)

mysql> grant select,insert,update,delete,create,drop
-> on bank.*
-> to ‘custom‘@‘localhost‘
-> identified by ‘obscure‘;
Query OK, 0 rows affected (0.00 sec)

mysql> grant select,insert,update,delete,create,drop on shop.* to ‘custom‘@‘localhost‘ identified by ‘obscure‘;
Query OK, 0 rows affected (0.00 sec)

mysql> grant select,insert,update,delete,create,drop on hospital.* to ‘custom‘@‘localhost‘ identified by ‘obscure‘;
Query OK, 0 rows affected (0.00 sec)
============================================================================================================================================
# mysql bank -u custom -p
mysql> use bank;
mysql> CREATE TABLE pet (name VARCHAR(20), owner VARCHAR(20), species VARCHAR(20), sex CHAR(1), birth DATE, death DATE);
Query OK, 0 rows affected (0.03 sec)
mysql> show tables;
+----------------+
| Tables_in_bank |
+----------------+
| pet |
+----------------+
1 row in set (0.00 sec)

mysql> DESC pet;
+---------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+---------+-------------+------+-----+---------+-------+
| name | varchar(20) | YES | | NULL | |
| owner | varchar(20) | YES | | NULL | |
| species | varchar(20) | YES | | NULL | |
| sex | char(1) | YES | | NULL | |
| birth | date | YES | | NULL | |
| death | date | YES | | NULL | |
+---------+-------------+------+-----+---------+-------+
6 rows in set (0.00 sec)

mysql> insert into pet values (‘Puffball‘,‘Diane‘,‘hamster‘,‘f‘,‘2001-02-01‘,NULL);
Query OK, 1 row affected (0.01 sec)
mysql> insert into pet values (‘Puffbffff‘,‘eric‘,‘hamster‘,‘f‘,‘2022-02-01‘,NULL);
Query OK, 1 row affected (0.00 sec)
mysql> insert into pet values (‘Pub‘,‘laszy‘,‘hamster‘,‘f‘,‘2222-02-01‘,NULL);
Query OK, 1 row affected (0.00 sec)

mysql> select * from pet;
+-----------+-------+---------+------+------------+-------+
| name | owner | species | sex | birth | death |
+-----------+-------+---------+------+------------+-------+
| Puffball | Diane | hamster | f | 2001-02-01 | NULL |
| Puffbffff | eric | hamster | f | 2022-02-01 | NULL |
| Pub | laszy | hamster | f | 2222-02-01 | NULL |
+-----------+-------+---------+------+------------+-------+
3 rows in set (0.00 sec)

mysql> select * from pet where name=‘Pub‘;
+------+-------+---------+------+------------+-------+
| name | owner | species | sex | birth | death |
+------+-------+---------+------+------------+-------+
| Pub | laszy | hamster | f | 2222-02-01 | NULL |
+------+-------+---------+------+------------+-------+
1 row in set (0.00 sec)

mysql> select name, owner from pet;
+-----------+-------+
| name | owner |
+-----------+-------+
| Puffball | Diane |
| Puffbffff | eric |
| Pub | laszy |
+-----------+-------+
3 rows in set (0.00 sec)

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