Relational Database Systems with Zero Information Loss

We use transaction time for time stamping object values to record their database history and formulate a zero information loss model for database transactions. The model consists of three components, a data history store, an update store, and a query store. In such a model, the effect of a past transaction (a query or an update) can be determined at any time. Additionally, the update and query stores allow us to reconstruct the circumstances of updates and the information divulged in queries. Such a model is suitable for the design of secure, easy to audit database systems. © 1993 IEEE