How to export data from oracle database

The methods to export data from an Oracle database are: Use the export data pump: expdp username/password tables=table_name directory=directory_name dumpfile=dumpfile_name.dmp Use the export utility: exp username/password file=dumpfile_name.dmp tables=table_name

How to export data from an Oracle database

Exporting Oracle database data is a common operation that can be used for data backup, migration, and data analysis. This article provides a step-by-step guide to exporting data from an Oracle database.

step:

1. Connect to the database

Use SQL*Plus or other database client tools to connect to an Oracle database.

2. Select the export method

Oracle provides a variety of export methods, including:

• Export data pump : A fast and reliable method for exporting large data sets.
• Export Utility (exp) : An older method, but still useful for exporting smaller datasets.

3. Export data using the Export Data Pump

To export data using the export data pump, use the following command:

 <code>expdp username/password tables=table_name directory=directory_name dumpfile=dumpfile_name.dmp</code>

in:

• username and password are the database username and password.
• tables are the table name to be exported (wildcards can be used).
• directory is the directory to which data is to be exported.
• dumpfile is the file name of the exported data file.

4. Export data using the Export utility

To export data using the Export utility, use the following command:

 <code>exp username/password file=dumpfile_name.dmp tables=table_name</code>

in:

• username and password are the database username and password.
• file is the file name of the exported data file.
• tables are the table name to be exported (wildcards can be used).

5. Verify the export

After the export is complete, verify that the exported data file is complete and corruption-free. The following commands can be used:

 <code>impdp username/password directory=directory_name dumpfile=dumpfile_name.dmp</code>

If no error message appears, the export is successful.

The above is the detailed content of How to export data from oracle database. For more information, please follow other related articles on the PHP Chinese website!