In applications like nancial trading, scheduling, manufacturing and process control, time based predicates in queries and rules are very important. There is also a need to dene ...
Implementing crash recovery in an Object-Oriented Database System (OODBMS) raises several challenging issues for performance that are not present in traditional DBMSs. These perfo...
We present a valid-time extension of SQL and investigate its efficient implementation on an Object-Relational database system. We propose an approach where temporal queries are ex...
Storage costs are rapidly decreasing, making it feasible to store larger amounts of data in databases. This also makes it possible to store previous versions of data in the databa...