Title :
Query languages for 1NF temporal databases
Author :
Zhang, Shichao ; Zhang, Chengqi
Author_Institution :
Sch. of Math. & Comput. Sci., New England Univ., Armidale, NSW, Australia
Abstract :
There are two factors that should be considered in defining or designing a temporal database. One is that the uncertain time "NOW" should be noticed in the relational algebraic operators extended for incorporating a temporal dimension. The other is that the temporal-normal-form is closure under operators extended. We establish gap-interval-based 1NF temporal tuple calculus language and the corresponding temporal relational algebra. The query languages are given some considerations to above two factors.
Keywords :
calculus; database theory; query languages; relational algebra; 1NF temporal databases; gap-interval-based language; query languages; relational algebraic operators; temporal relational algebra; temporal tuple calculus language; temporal-normal-form; uncertain time; Algebra; Australia Council; Calculus; Data models; Database languages; Relational databases; Speech; Telecommunication computing; Testing;
Conference_Titel :
TENCON '97. IEEE Region 10 Annual Conference. Speech and Image Technologies for Computing and Telecommunications., Proceedings of IEEE
Conference_Location :
Brisbane, Qld., Australia
Print_ISBN :
0-7803-4365-4
DOI :
10.1109/TENCON.1997.647294
