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<p>An implementation model for the standard relational data model extended with transaction time is presented. The implementation model integrates techniques of view materialization, differential computation, and deferred update into a coherent whole. It is capable of storing any view (reflecting past or present states) and subsequently using stored views as outsets for incremental and decremental computations of requested views, making it more flexible than previously proposed partitioned storage models. The working and the expressiveness of the model are demonstrated by sample queries that show how historical data are retrieved.</p>
incremental computations; data retrieval; relational databases; transaction time; relational data model; view materialization; differential computation; deferred update; stored views; decremental computations; partitioned storage models; queries; historical data; database theory; relational databases

N. Roussopoulos, L. Mark and C. Jensen, "Incremental Implementation Model for Relational Databases with Transaction Time," in IEEE Transactions on Knowledge & Data Engineering, vol. 3, no. , pp. 461-473, 1991.
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