RedHat 下mysql安裝,簡單設置以用基本的使用方法，需要的朋友可以參考下。
1. 下載RPM安裝包， 因為安裝MySQL的時候，軟件會需要一依賴關系， 所以建議把所有的安裝包下載下載， 再依次安裝所以的RPM包。
2. 在RedHat下安裝后, root密碼為空, 設置MySQL的 root密碼, 用下面的命令來設置.
[nb@SIT ~]$ mysql -u root -p[newpassword]
3. 修改MySQL的root 密碼, 用下面 的命令:
[nb@SIT ~]$ mysqladmin -u root -p[oldpasswrod] password[newpassword]
4. 用root登錄MySQL, 輸入下面的命令, 再輸入密碼, 就可以以root的身份登錄到MySQL
[nb@SIT ~]$ mysql -u root -p
Enter password:
5. 出現下面的字符， 就表示成功登錄到了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. 顯示當前已經存在的數據庫，輸入: show databases;
mysql> show databases;
+——————–+
| Database |
+——————–+
| information_schema |
| mysql |
| performance_schema |
| test |
+——————–+
4 rows in set (0.00 sec)
7. 創建一個新的數據庫, 輸入: 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. 刪除一個已經存在的數據庫, 輸入: 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. 創建一張表, 輸入: create table [name] [option…]
顯示表的內容: 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. 向表里面添加數據, 輸入: 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”,descript=”this is a good device”;
Query OK, 1 row affected (0.00 sec)
11. 查看表里面的內容, 輸入: 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. 選擇性的查詢表里的內容, * 是通配符, 表示所有的, 查詢單項的時候, 輸入: 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. 選擇性查詢表里的內容, 輸入: 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)
