隨着數據的增多，數據的備份顯得日益重要，下面是mysql常用的數據導入導出命令。
1.導出整個數據庫
格式：mysqldump -u username -p databases_name > databackup.sql
2.導出一個表
格式：mysqldump -u username -p database_name table_name > databackup.sql
3.導出一個數據庫結構
格式：mysqldump -u username -p -d --add-drop-table database_name > databackup.sql
說明：-d 選項表示沒有數據
--add-drop-table 選項說明在每個create語句之前增加一個drop table
4.導入數據庫
導入時常用source 命令,進入mysql數據庫控制檯：
C:\MySQL\MySQL Server 5.0\bin>mysql -u root -p
Enter password:*******
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 10 to server version: 5.0.7-beta-nt
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.
mysql> use testdb;
Database changed
mysql> source testdb.sql;
Query OK, 0 rows affected (0.05 sec)
Query OK, 0 rows affected (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
Query OK, 0 rows affected (0.13 sec)
Query OK, 0 rows affected (0.10 sec)
Query OK, 0 rows affected (0.01 sec)
Query OK, 0 rows affected (0.00 sec)
Query OK, 2 rows affected (0.04 sec)
Records: 2 Duplicates: 0 Warnings: 0
Query OK, 0 rows affected (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
Query OK, 0 rows affected (0.03 sec)
Query OK, 0 rows affected (0.09 sec)
Query OK, 0 rows affected (0.00 sec)
Query OK, 0 rows affected (0.01 sec)
Query OK, 2 rows affected (0.03 sec)
Records: 2 Duplicates: 0 Warnings: 0
Query OK, 0 rows affected (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
Query OK, 0 rows affected (0.01 sec)
Query OK, 0 rows affected (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
mysql>
以上信息便是mysql較常用的命令導出導入方式。
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