Abstract: The relational database model (RDM), proposed by Codd, has been proven to be a very useful model in many applications. The inherent of the RDM is effective for precise and unambiguous data.

This subject introduces students to relational database design and SQL (Structured Query Language) used with relational databases. Students will be introduced to relational and object oriented models ...

Abstract: In this paper we present a formal model of semantics for cisets, ciset relations and ciset relational operators. The notion of alternate worlds is used to formalize the information content ...

Each region relation corresponds to a relational operator in TC. Each relational operator takes two forms, one unary and the other binary. The unary form, op S, generates the set of regions that bear ...

[a-zA-Z]+ { printf("\n%s is a WORD", yytext); } "==" { printf("\n%s is a RELATIONAL OPERATOR", yytext); } "!=" { printf("\n%s is a RELATIONAL OPERATOR", yytext ...

A relational DBMS organizes and accesses data according to relationships among data items. The relationships among data items are expressed by tables consisting of columns and rows. The order of the ...