mysql 创建删除数据库(linux)


1.Mysql 客户端创建、删除数据库:

[root@localhost~]# /usr/local/mysql/bin/mysql -u root -p
Enter password:
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 6
Server version: 5.1.60-log 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>

2)创建空数据库

mysql> create database daobidao;
ERROR 2006 (HY000): MySQL server has gone away
No connection. Trying to reconnect...
Connection id:    7
Current database: *** NONE ***
 
Query OK, 1 row affected (0.00 sec)
 
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| daobidao           |
| mysql              |
+--------------------+
3 rows in set (0.00 sec)

以上命令:create database 库名; 就可以创建一个空的数据库,例如命令:create database daobidao;  创建一个daobidao的空数据库;命令:show databases; 显示所有的数据库。


3)删除数据库

mysql> drop database daobidao;
ERROR 2006 (HY000): MySQL server has gone away
No connection. Trying to reconnect...
Connection id:    9
Current database: *** NONE ***
 
Query OK, 0 rows affected (0.01 sec)
 
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
+--------------------+
2 rows in set (0.00 sec)

以上命令:drop database 库名; 就可以删除一个数据库;例如命令:drop database daobidao; 就删除了daobidao 数据库。


2.Mysql客户端导入、导出数据库

1)导入数据库 [方法一]

[root@localhost~]# /usr/local/mysql/bin/mysql -u root -p daobidao < /root/test.sql    

Enter password:

以上命令:/usr/local/mysql/bin/mysql -u root -p 需要导入到哪个数据库的数据库名 < 需要导入的数据库文件;例如命令:/usr/local/mysql/bin/mysql -u root -p daobidao < /root/test.sql   将数据库文件test.sql文件导入到daobidao数据库中; (但需要导入到哪个数据库必须要存在)

2)导入数据库 [方法二]

mysql> create database daobidao;
Query OK, 1 row affected (0.00 sec)
 
mysql> use daobidao;
Database changed
mysql> source /root/test.sql;
ERROR 2006 (HY000): MySQL server has gone away
No connection. Trying to reconnect...
Connection id:    17
Current database: daobidao
 
Query OK, 0 rows affected (0.00 sec)
 
Query OK, 0 rows affected (0.00 sec)
 
Query OK, 0 rows affected (0.00 sec)
 
····························


以上命令:1)创建一个数据库,2)使用该数据库,3)导入数据库文件;例如命令:1)create database daobidao; 创建一个空数据库; 2)use daobidao; 使用该数据库; 3) source /root/test.sql;  导入数据库文件。(但需要导入到哪个数据库必须要存在)


3)导出数据库的数据和表结构

[root@localhost~]#/usr/local/mysql/bin/mysqldump -u root -p daobidao > /root/dbd.sql
Enter password:

以上命令:/usr/local/mysql/bin/mysqldump -u root -p 需要导出的数据库 > 导出存放的数据库文件名; 例如命令:/usr/local/mysql/bin/mysqldump -u root -p daobidao > /root/dbd.sql 将daobidao 数据库导出,存放在/root/dbd.sql文件。

4)导出数据库的表结构


[root@localhost~]#/usr/local/mysql/bin/mysqldump -u root -p -d daobidao > /root/dbd.sql
Enter password:


以上命令:/usr/local/mysql/bin/mysqldump -u root -p -d 需要导出的数据库 > 导出存放的数据库文件名; 例如命令:/usr/local/mysql/bin/mysqldump -u root -p -d daobidao > /root/dbd.sql 将daobidao 数据库导出表结构,存放在/root/dbd.sql文件。




















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