Agayan

The article presents an analysis of approaches to implementation of temporal systems based on relational database. In this paper the authors give definitions of temporal data and temporal databases. The authors present approaches to time modeling on the basis of which the types of time stamps used in temporal databases are described. The paper identifies two main ways to implement temporal systems using current relational database: implementation of temporal support at the application level and expansion of the non-temporal relational model to the temporal one. As a result, for each approach the authors identified respective advantages and disadvantages.