Title :
On making relational division comprehensible
Author :
McCann, Lester I.
Author_Institution :
Dept. of Comput. Sci., Wisconsin Univ., Kenosha, WI, USA
Abstract :
Division is the most intellectually challenging of the basic operators of relational algebra. Although its utility is unquestioned, its presentation by many textbooks, and therefore by many instructors, leaves much to be desired. This paper examines the standard approaches used to express division in relational algebra and SQL, explains the derivation of each, and presents a coherent sequence of examples that we have used successfully to teach division to students in introductory database classes.
Keywords :
SQL; computer science education; relational algebra; relational databases; teaching; SQL; division operation teaching; instructors; introductory database classes; relational algebra; relational database management systems; student teaching; textbooks; Algebra; Cities and towns; Computer science; Computer science education; Concrete; Logic;
Conference_Titel :
Frontiers in Education, 2003. FIE 2003 33rd Annual
Print_ISBN :
0-7803-7961-6
DOI :
10.1109/FIE.2003.1264699
