Using Export and Import to Move a Database Between Platforms

The Export and Import utilities are the only method that Oracle supports for moving an existing Oracle database from one hardware platform to another. This includes moving between UNIX and NT systems and also moving between two NT systems running on different platforms.

The following steps present a general overview of how to move a database between platforms.

1. As a DBA user, issue the following SQL query to get the exact name of all tablespaces. You will need this information later in the process.

   SQL> SELECT tablespace_name FROM dba_tablespaces;

   select name,tablespace_name from dba_data_files;
   注：在导入之前必须在目标库建立表空间，最后查看数据库文件信息，目标库建立表空间的时候创建一样的数据文件，数据文件路径可以不一致      

2. As a DBA user, perform a full export from the source database, for example:

   > exp system/manager FULL=y FILE=expdat.dmp
   

   
   

   See Also: Points to Consider for Full Database Exports and Imports

   
   

3. Move the dump file to the target database server. If you use FTP, be sure to copy it in binary format (by entering binary at the FTP prompt) to avoid file corruption.

4. Create a database on the target server.

   
   

   See Also: Oracle Database Administrator's Guide for information about how to create a database

   
   

5. Before importing the dump file, you must first create your tablespaces, using the information obtained in Step 1. Otherwise, the import will create the corresponding datafiles in the same file structure as at the source database, which may not be compatible with the file structure on the target system.

6. As a DBA user, perform a full import with the IGNORE parameter enabled:

   > imp system/manager FULL=y IGNORE=y FILE=expdat.dmp
   
   

   Using IGNORE=y instructs Oracle to ignore any creation errors during the import and permit the import to complete.

7. Perform a full backup of your new database.