A RELATIONAL-CALCULUS QUERY LANGUAGE FOR HISTORICAL DATABASES

被引：5

作者：

BASSIOUNI, MA

LLEWELLYN, MJ

机构：

[1] Department of Computer Science, University of Central Florida, Orlando

来源：

COMPUTER LANGUAGES | 1992年 / 17卷 / 03期

关键词：

HISTORICAL DATABASES; QUERY LANGUAGES; BOOLEAN OPERATORS; TEMPORAL LOGIC; RELATIONAL-CALCULUS; RELATIONAL USER INTERFACES;

D O I：

10.1016/0096-0551(92)90028-L

中图分类号：

TP31 [计算机软件];

学科分类号：

081202 ; 0835 ;

摘要：

In this paper, an approach to handle time in relational query languages is outlined. The approach is based on extending Boolean and comparison operators by allowing their operands to be sets of intervals. The proposed temporal logic is shown to satisfy the properties of the normal Boolean logic. A relational-calculus query language using the extended logic is developed. The extended logic presented in this paper provides a good degree of flexibility in expressing different temporal requirements and therefore promises to be a successful approach for designing powerful temporal query languages.

引用

页码：185 / 197

页数：13

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