mysql test数据库_mysql数据库test
Re介紹一下CentOS下MySQL數(shù)據(jù)庫的安裝與配置方法
MySQL數(shù)據(jù)庫配置的具體步驟：
1、編輯MySQL的配置文件，使用vi /etc/my.cnf
[root@sample ~]# vi /etc/my.cnf ← 編輯MySQL的配置文件
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
# Default to using old password format for compatibility with mysql 3.x
# clients (those using the mysqlclient10 compatibility package).
old_passwords=1 ← 找到這一行，在這一行的下面添加新的規(guī)則，讓MySQL的默認(rèn)編碼為UTF-8
default-character-set = utf8 ← 添加這一行
然后在配置文件的文尾填加如下語句：
[mysql]
default-character-set = utf8
2、啟動MySQL，并讓MySQL在系統(tǒng)重新啟動后隨系統(tǒng)自動啟動。
[root@sample ~]# chkconfig mysqld on ← 設(shè)置MySQL服務(wù)隨系統(tǒng)啟動自啟動
[root@sample ~]# chkconfig --list mysqld ← 確認(rèn)MySQL自啟動
mysqld 0:off 1:off 2:on 3:on 4:on 5:on 6:off ← 如果2--5為on的狀態(tài)就OK
[root@sample ~]# /etc/rc.d/init.d/mysqld start ← 啟動MySQL服務(wù)
Initializing MySQL database: [ OK ]
Starting MySQL: [ OK ]
3、為MySQL的root用戶設(shè)置密碼
[root@sample ~]# mysql -u root ← 用root用戶登錄MySQL服務(wù)器
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 2 to server version: 4.1.20
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql> select user,host,password from mysql.user; ← 查看用戶信息
+------+------------------------------+---------------+
| user | host | password |
+------+------------------------------+---------------+
| root | localhost | | ← root密碼為空
| root | sample.centospub.com | | ← root密碼為空
| | sample.centospub.com | |
| | localhost | |
+------+------------------------------+---------------+
4 rows in set (0.00 sec)
mysql> set password for root@localhost=password('在這里填入root密碼'); ← 設(shè)置root密碼
Query OK, 0 rows affected (0.01 sec)
mysql> set password for root@'sample.centospub.com'=password('在這里填入root密碼'); ← 設(shè)置root密碼
Query OK, 0 rows affected (0.01 sec)
mysql> select user,host,password from mysql.user; ← 查看用戶信息
+------+--------------------------------+--------------------------+
| user | host | password |
+------+--------------------------------+--------------------------+
| root | localhost | 19b68057189b027f | ← root密碼被設(shè)置
| root | sample.centospub.com | 19b68057189b027f | ← root密碼被設(shè)置
| | sample.centospub.com | |
| | localhost | |
+------+--------------------------------+--------------------------+
4 rows in set (0.01 sec)
mysql> exit ← 退出MySQL服務(wù)器
Bye
4、測試一下root密碼有沒有生效。
[root@sample ~]# mysql -u root ← 通過空密碼用root登錄
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO) ← 出現(xiàn)此錯誤信息說明密碼設(shè)置成功
[root@localhost ~]# mysql -u root -h sample.centospub.com ← 通過空密碼用root登錄
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO) ← 出現(xiàn)此錯誤信息說明密碼設(shè)置成功
[root@sample ~]# mysql -u root -p ← 通過密碼用root登錄
Enter password: ← 在這里輸入密碼
Welcome to the MySQL monitor. Commands end with ; or \g. ← 確認(rèn)用密碼能夠成功登錄
Your MySQL connection id is 5 to server version: 4.1.20
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql> exit
Bye
[root@sample ~]# mysql -u root -h sample.centospub.com -p ← 通過密碼用root登錄
Enter password: ← 在這里輸入密碼
Welcome to the MySQL monitor. Commands end with ; or \g. ← 確認(rèn)用密碼能夠成功登錄
Your MySQL connection id is 6 to server version: 4.1.20
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql> exit ← 退出MySQL服務(wù)器
Bye
5、刪除匿名用戶。在MySQL剛剛被安裝后，存在用戶名、密碼為空的用戶。這使得數(shù)據(jù)庫服務(wù)器有無需密碼被登錄的可能性。為消除隱患，將匿名用戶刪除。
[root@sample ~]# mysql -u root -p ← 通過密碼用root登錄
Enter password: ← 在這里輸入密碼
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 7 to server version: 4.1.20
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql> select user,host from mysql.user; ← 查看用戶信息
+------+----------------------------+
| user | host |
+------+----------------------------+
| | localhost |
| | 127.0.0.1 |
| root | localhost |
| | sample.centospub.com |
| root | sample.centospub.com |
+------+----------------------------+
4 rows in set (0.02 sec)
mysql> delete from mysql.user where user=''; ← 刪除匿名用戶
Query OK, 2 rows affected (0.17 sec)
mysql> select user,host from mysql.user; ← 查看用戶信息
+------+----------------------------+
| user | host |
+------+----------------------------+
| root | localhost |
| root | sample.centospub.com |
+------+----------------------------+
2 rows in set (0.00 sec)
mysql> exit ← 退出MySQL服務(wù)器
Bye
6、刪除測試用數(shù)據(jù)庫。在MySQL被安裝后，存在名為test的空數(shù)據(jù)庫，將它刪除。這里要注意的是，系統(tǒng)默認(rèn)的還有一個名為mysql的數(shù)據(jù)庫，它用于系統(tǒng)管理，所以請不要刪除。
[root@sample ~]# mysql -u root -p ← 通過密碼用root登錄
Enter password: ← 在這里輸入密碼
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 8 to server version: 4.1.20
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql> show databases; ← 查看系統(tǒng)已存在的數(shù)據(jù)庫
+-------------+
| Database |
+-------------+
| mysql |
| test |
+------------+
2 rows in set (0.02 sec)
mysql> drop database test; ← 刪除名為test的空數(shù)據(jù)庫
Query OK, 0 rows affected (0.07 sec)
mysql> show databases; ← 查看系統(tǒng)已存在的數(shù)據(jù)庫
+-------------+
| Database |
+-------------+
| mysql | ← 確認(rèn)名為test的數(shù)據(jù)庫被刪除，已不存在
+-------------+
1 row in set (0.00 sec)
mysql> exit ← 退出MySQL服務(wù)器
Bye
-------------------------
Re介紹一下CentOS下MySQL數(shù)據(jù)庫的安裝與配置方法
經(jīng)過上面的安裝與配置，MySQL數(shù)據(jù)庫應(yīng)該可以用了，下面讓我們來測一下：
1、包括建立新用戶，以及用對關(guān)系性數(shù)據(jù)庫進(jìn)行數(shù)據(jù)庫操作的指令來試著建立數(shù)據(jù)庫及數(shù)據(jù)表。這里，新建用戶以centospub為例。
[root@sample ~]# mysql -u root -p ← 通過密碼用root登錄
Enter password: ← 在這里輸入密碼
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 9 to server version: 4.1.20
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql> grant all privileges on test.* to centospub@localhost identified by '在這里定義密碼'; ← 建立對test數(shù)據(jù)庫有完全操作權(quán)限的名為centospub的用戶
Query OK, 0 rows affected (0.03 sec)
mysql> select user from mysql.user where user='centospub'; ← 確認(rèn)centospub用戶的存在與否
+---------+
| user |
+---------+
| centospub | ← 確認(rèn)centospub已經(jīng)被建立
+---------+
1 row in set (0.01 sec)
mysql> exit ← 退出MySQL服務(wù)器
Bye
[root@sample ~]# mysql -u centospub -p ← 用新建立的centospub用戶登錄MySQL服務(wù)器
Enter password: ← 在這里輸入密碼
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 10 to server version: 4.1.20
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql> create database test; ← 建立名為test的數(shù)據(jù)庫
Query OK, 1 row affected (0.00 sec)
mysql> show databases; ← 查看系統(tǒng)已存在的數(shù)據(jù)庫
+-------------+
| Database |
+-------------+
| test |
+-------------+
1 row in set (0.00 sec)
mysql> use test ← 連接到數(shù)據(jù)庫
Database changed
mysql> create table test(num int, name varchar(50)); ← 在數(shù)據(jù)庫中建立表
Query OK, 0 rows affected (0.03 sec)
mysql> show tables; ← 查看數(shù)據(jù)庫中已存在的表
+-------------------+
| Tables_in_test |
+-------------------+
| test |
+-------------------+
1 row in set (0.01 sec)
mysql> insert into test values(1,'Hello World!'); ← 插入一個值到表中
Query OK, 1 row affected (0.02 sec)
mysql> select * from test; ← 查看數(shù)據(jù)庫中的表的信息
+------+-------------------+
| num | name |
+------+-------------------+
| 1 | Hello World! |
+------+-------------------+
1 row in set (0.00 sec)
mysql> update test set name='Hello Everyone!'; ← 更新表的信息，賦予新的值
Query OK, 1 row affected (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 0
mysql> select * from test; ← 查看數(shù)據(jù)庫中的表的信息
+------+----------------------+
| num | name |
+------+----------------------+
| 1 | Hello Everyone! | ← 確認(rèn)被更新到新的值
+------+----------------------+
1 row in set (0.01 sec)
mysql> delete from test where num=1; ← 刪除表內(nèi)的值
Query OK, 1 row affected (0.00 sec)
mysql> select * from test; ← 確認(rèn)刪除結(jié)果
Empty set (0.01 sec)
mysql> drop table test; ← 刪除表
Query OK, 0 rows affected (0.01 sec)
mysql> show tables; ← 查看表信息
Empty set (0.00 sec) ← 確認(rèn)表已被刪除
mysql> drop database test; ← 刪除名為test的數(shù)據(jù)庫
Query OK, 0 rows affected (0.01 sec)
mysql> show databases; ← 查看已存在的數(shù)據(jù)庫
Empty set (0.01 sec) ← 確認(rèn)test數(shù)據(jù)庫已被刪除(這里非root用戶的關(guān)系，看不到名為mysql的數(shù)據(jù)庫)
mysql> exit ← 退出MySQL服務(wù)器
Bye
2、刪除測試用過的遺留用戶。(當(dāng)然，如果是直接建立自己的數(shù)據(jù)庫的，可以省略此步)
[root@sample ~]# mysql -u root -p ← 通過密碼用root登錄
Enter password: ← 在這里輸入密碼
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 12 to server version: 4.1.20
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql> revoke all privileges on *.* from centospub@localhost; ← 取消centospub用戶對數(shù)據(jù)庫的操作權(quán)限
Query OK, 0 rows affected (0.00 sec)
mysql> delete from mysql.user where user='centospub' and host='localhost'; ← 刪除centospub用戶
Query OK, 1 row affected (0.01 sec)
mysql> select user from mysql.user where user='centospub'; ← 查找用戶centospub，確認(rèn)已刪除與否
Empty set (0.01 sec) ← 確認(rèn)centospub用戶已不存在
mysql> flush privileges; ← 刷新，使以上操作生效
Query OK, 0 rows affected (0.01 sec)
mysql> exit
Bye
3、重新啟動一次HTTP服務(wù)，讓php-mysql反映到HTTP服務(wù)中。
[root@sample ~]# /etc/rc.d/init.d/httpd restart ← 重新啟動HTTP服務(wù)
Stopping httpd: [ OK ]
Starting httpd: [ OK ]
OK了！經(jīng)測試，我的網(wǎng)站lunfawang.com?? MySQL數(shù)據(jù)庫服務(wù)器運(yùn)行正常！
-------------------------
Re介紹一下CentOS下MySQL數(shù)據(jù)庫的安裝與配置方法
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