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Using Object IDs (OIDs) in Oracle 8

Oracle Tips by Mike Ault

Using REF Values for Retrieval of Data Values

One limiting aspect of the referential integrity days in relational databases was that you had to join tables by their key values to retrieve related rows of data from two tables. Through the use of a REF value, there is no need to perform a join since you already have the unique identifier for the object row you wish to retrieve stored in the child table. This means that the driver for queries will be from the child to the parent.

SEE CODE DEPOT FOR FULL SCRIPTS


For more information on this topic, I recommend Don Burleson's latest book "Oracle Tuning: The Definitive Reference". 

You can buy it direct from the publisher for 50%-off and get instant access to the code depot of Oracle tuning scripts:

http://www.rampant-books.com/book_1002_oracle_tuning_definitive_reference_2nd_ed.htm


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