Temporal databases provide a complete history of all changes to a database, and include the times when changes occurred. Temporal database managements support transaction time and valid time in handling temporal information.
This pater describes the...
Temporal databases provide a complete history of all changes to a database, and include the times when changes occurred. Temporal database managements support transaction time and valid time in handling temporal information.
This pater describes the processing strategy of aggregate functions used in temporal databases.
We describes algorithms for processing scalar aggregates and aggregate functions in conventional database systems.
This paper describes algorithms to compute aggregate functions in temporal database as well.
An aggregate tree strategy has been used for the operation of aggregate in time variant relation.
The aggregate tree strategy works well not only when tuples have not been aligned on a basic of tuples valid time attribute but also when the base relation should be partitioned.