Cover: Deferring updates in a relational data base system

Deferring updates in a relational data base system

by Stephanie J. Cammarata

Purchase Print Copy

 FormatList Price Price
Add to Cart Paperback27 pages $20.00 $16.00 20% Web Discount

Deferred updating in a relational database is a technique which delays the application of updates until a request is made for the value. In general, we do not know, a priori, which of the updated values will be retrieved; therefore, it is beneficial to defer the access and computation. This technique promotes an "update-by-need" policy. The method uses generalization, property inheritance, and procedural attachment for dynamically maintaining the update and query processes. The use of these representational concepts aids in maintaining the structure of the relational model, yet provides opportunities to extend the semantic power of the model.

This report is part of the RAND Corporation Paper series. The paper was a product of the RAND Corporation from 1948 to 2003 that captured speeches, memorials, and derivative research, usually prepared on authors' own time and meant to be the scholarly or scientific contribution of individual authors to their professional fields. Papers were less formal than reports and did not require rigorous peer review.

This document and trademark(s) contained herein are protected by law. This representation of RAND intellectual property is provided for noncommercial use only. Unauthorized posting of this publication online is prohibited; linking directly to this product page is encouraged. Permission is required from RAND to reproduce, or reuse in another form, any of its research documents for commercial purposes. For information on reprint and reuse permissions, please visit

The RAND Corporation is a nonprofit institution that helps improve policy and decisionmaking through research and analysis. RAND's publications do not necessarily reflect the opinions of its research clients and sponsors.