14.1 introduction to expdp and impdp

(1) Data Pump Export (data dump export ). Data Pump export is a new function of Oracle Database 10 Gb, which means to use the utility expdp to export the metadata or data of the database object to the dump file.

(2) Data Pump import (data dump import ). Data Pump import is a new feature of Oracle Database 10g, which refers to the use of the utility impdp to import the metadata and data in the dump file to the Oracle database.

(3) Role of data pump export (expdp and impdp.

• Data Pump export and import can achieve logical backup and logical recovery. By using expdp, you can back up database objects to the dump file. When a table is accidentally deleted or truncated, you can use impdp to import objects and data in the dump file to the database.
• Data Pump export and import can move objects between database users. For example, you can use expdp to store objects in the Scott scheme to the dump file, and use impdp to import objects in the dump file to other database users.
• You can use the data pump import (impdp) to move objects between databases. By using the impdp tool, you can directly move objects in one database to another.
• Data Pump export and import can be used to migrate tablespaces. By combining expdp and impdp, you can move the tablespace of one database to another.

(4) differences between data pump export and traditional export.

• Exp and IMP are client toolsProgramThey can be used on both the client and the server.
• Expdp and impdp are server-side tool programs that can only be used on the Oracle server, but not on the Oracle client.
• IMP only applies to exp export files, not expdp export files; impdp only applies to expdp export files, not exp export files.