Update of data by Data Pump Import

Hi all!

I want to update the data in my database using Full Import Data Pump to a different database. But I do not know which option I should use when executing import for the second time? Or I can run full import without encompassing any option again?

Thank you

Tien Lai

What if all you want to do is update of data and if the tables already exist, you can use this:

content of user/password = data_only =(truncate or append) table_exists_action Impdp...

If you use Add, then add new data to the existing data. If you use truncate then existing data will be deleted and the data in the dumpfile will be imported.

There will be problems if you have a referential constraint. Say that table 1 references given in table 2, if datapump loads data into Database2 first, and then it truncates the data again. This truncation may fail because there is a referential constraint on it. If you have a ref, then you must disable them before you run impdp and then allow them once impdp is completed.

If all you want after the first import only the data, you can add the

content = data_only

your order expdp. He would complete much faster.

Do not forget that your statistics on the tables and the indexes will not be reloaded if you use table_exists_action = truncate or replace existing statistics so would probably obsolete.

If you want to replace the table and the data, then the command would be:

Impdp username/password table_exists_action = replace...

This will remove the table and re-create it, and then load the data, then create all dependent objects for tables.

I hope this helps.

Dean

Tags: Database

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