Temporal Database System

More and more organisations everyday are now storing achieves of data to help them make important business decisions. The Commercial Database Management Systems (DBMS) that are available in the I.T. market do not provide any significant and useful methods of storing and manipulate such data. Whilst there has been research into the subject of Temporal Databases, there is a lack of commercial tools. The project aims to design and develop a Temporal Database Management System (TDBMS) that provides means to manipulate temporal data. The TDBMS will provide a Temporal Relational Algebra (TRA) structured query language that is based on and is an extension to Relational Algebra (RA) for extracting data from the Temporal Database. The TRA is to contain most the common operators that are associated with RA such as Cartesian Product, Natural Join, Union and many more. The TRA will introduce new temporal operators, Until and Since based on US logic, which are useful for querying Temporal Databases. US logic is the result of research work undertaken at Imperial College, which have been shown to be useful for Temporal Databases and is mathematically sound.