Title :
How to achieve SQL in approximate divide and exact relation division by Relational algebra
Author :
Qian, Shao ; Lu, Yili
Author_Institution :
Dept. of Comput. Sci. Inst., Coll. of Traffic Manage. Cadres, Beijing, China
Abstract :
Relational algebra is the basis of relational database theory, however, SQL is a concrete realization of the standard computer language. Particularly, the division problem in Relational algebra, in many circumstances, it´s just a form of the abstract theory. By taking a further step of analyzing relational algebra, it will be devided into two parts: approximate divide and exact relation division, the paper will achieve SQL in approximate divide and exact relation division by Relational algebra.
Keywords :
SQL; relational algebra; relational databases; SQL; abstract theory; approximate divide; exact relation division; relational algebra; relational database theory; Algebra; Computer languages; Computer science; Concrete; Educational institutions; Relational databases; Division; Relational algebra; SQL;
Conference_Titel :
Computer and Automation Engineering (ICCAE), 2010 The 2nd International Conference on
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-5585-0
Electronic_ISBN :
978-1-4244-5586-7
DOI :
10.1109/ICCAE.2010.5451588
