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Purging data in Oracle 9i

Can you please briefly explain data purging? What technology or method can I use to purge data in Oracle 9i?

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Purging could mean many different things, but for most people it simply refers to deleting from a database rows that are no longer needed. You can purge with DELETE statements that have a predicate specifying which rows to delete (DELETE FROM <table> WHERE <condition>). Or, if you know that you will have an ongoing need to purge data and can identify the key column(s) whose values will indicate whether to purge a row, you can partition your tables on the key column(s) in question. Purging then can be accomplished very quickly by dropping partitions.

This was first published in January 2006

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