How to backup oracle database table

To back up Oracle database tables, use the EXPORT command to export the table: EXPORT table_name TO filename.dmp. Use RMAN to create a backup set: BACKUP TABLESPACE tablespace_name

How to back up Oracle database tables

Export tables:

1. Use the EXPORT command from the database Export table. The syntax is as follows:

   <code>EXPORT table_name TO filename.dmp</code>

   For example:

   <code>EXPORT customers TO customers.dmp</code>

2. Specify the data type to be exported, such as table data (ROWS) and table definition (TABLE):

   <code>EXPORT table_name TO filename.dmp ROWS=Y TABLE=Y</code>

Import table:

1. Use the IMPORT command Import the table into the database. The syntax is as follows:

   <code>IMPORT table_name FROM filename.dmp</code>

   For example:

   <code>IMPORT customers FROM customers.dmp</code>

2. Specify import options, such as ignore errors (IGNORE=Y) and update existing data (TABLEEXISTS=REPLACE):

   <code>IMPORT table_name FROM filename.dmp IGNORE=Y TABLEEXISTS=REPLACE</code>

Using RMAN:

1. Using Oracle Recovery Manager (RMAN ) to create a backup set. The syntax is as follows:

   <code>BACKUP TABLESPACE tablespace_name</code>

   For example:

   <code>BACKUP TABLESPACE customers</code>

2. Restore the table space backup to the target database. The syntax is as follows:

   <code>RESTORE TABLESPACE tablespace_name FROM backupset</code>

   For example:

   <code>RESTORE TABLESPACE customers FROM backupset</code>

Tips:

• Execute ## on the database before backing up #ALTER DATABASE BACKUP CONTROLFILE TO TRACE to generate a backup control file.
Back up the database regularly and verify that the backup is valid.
• Before restoring a table, make sure that the target database is compatible with the database version when the backup was created.

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