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《MYSQL教程RedHat下MySQL的基本使用方法分享》要点：
本文介绍了MYSQL教程RedHat下MySQL的基本使用方法分享，希望对您有用。如果有疑问，可以联系我们。
1. 下载RPM安装包,因为安装MySQL的时候,软件会需要一依赖关系,所以建议把所有的安装包下载下载,再依次安装所以的RPM包.
2. 在RedHat下安装后,root密码为空,设置MySQL的 root密码,用下面的命令来设置.
[nb@SIT ~]$ mysql -u root -p[newpassword]
3. 修改MySQL的root 密码,用下面 的命令:
[nb@SIT ~]$ mysqladmin -u root -p[oldpasswrod] password[newpassword]
4. 用root登录MySQL,输入下面的命令,再输入密码,就可以以root的身份登录到MySQL
[nb@SIT ~]$ mysql -u root -p
Enter password:
5. 出现下面的字符,就表示成功登录到了MySQL,
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 14
Server version: 5.5.14 MySQL Community Server (GPL)
Copyright (c) 2000,2010,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>
6. 显示当前已经存在的数据库,输入: show databases;
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
4 rows in set (0.00 sec)
7. 创建一个新的数据库,输入: create database [name];
mysql> create database mytest;
Query OK,1 row affected (0.00 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| mytest |
| performance_schema |
| test |
+--------------------+
5 rows in set (0.00 sec)
8. 删除一个已经存在的数据库,输入: drop database [name];
mysql> drop database mytest;
Query OK,0 rows affected (0.00 sec)
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
4 rows in set (0.00 sec)
9. 创建一张表,输入: create table [name] [option...]
显示表的内容: describe [table name];
mysql> create table device
-> (
-> id int,
-> pn varchar(8),
-> descript varchar(30)
-> );
Query OK,0 rows affected (0.01 sec)
mysql> describe device;
+----------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------+-------------+------+-----+---------+-------+
| id | int(11) | YES | | NULL | |
| pn | varchar(8) | YES | | NULL | |
| descript | varchar(30) | YES | | NULL | |
+----------+-------------+------+-----+---------+-------+
3 rows in set (0.00 sec)
10. 向表里面添加数据,输入: insert into [table_name] set option1=[value],option2=[value] ...
mysql> insert into device set id=1,pn="abcd",descript="this is a good device";
Query OK,1 row affected (0.01 sec)
mysql> insert into device set id=2,pn="efgh",1 row affected (0.00 sec)
11. 查看表里面的内容,输入: select [col_name] from [table_name]
mysql> select * from device;
+------+------+-----------------------+
| id | pn | descript |
+------+------+-----------------------+
| 1 | abcd | this is a good device |
| 2 | efgh | this is a good device |
+------+------+-----------------------+
2 rows in set (0.01 sec)
12. 选择性的查询表里的内容,* 是通配符,表示所有的,查询单项的时候,输入: select * from [table_name] where opiont=[value];
mysql> select * from device where id=2;
+------+------+-----------------------+
| id | pn | descript |
+------+------+-----------------------+
| 2 | efgh | this is a good device |
+------+------+-----------------------+
1 row in set (0.00 sec)
13. 选择性查询表里的内容,输入: select [option]...[option] from [table_name] where [option]=[value];
mysql> select id,descript from device where id=2;
+------+-----------------------+
| id | descript |
+------+-----------------------+
| 2 | this is a good device |
+------+-----------------------+
1 row in set (0.00 sec)MYSQL应用 （编辑：李大同）
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