منابع مشابه
Database Integrity Checking
Integrity constraints (or simply “constraints”) are formal representations of invariant conditions for the semantic correctness of database records. Constraints can be expressed in declarative languages such as datalog, predicate logic, or SQL. This article highlights the historical background of integrity constraints and the essential features of their simplified incremental evaluation. It con...
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متن کاملMandatory Controls for Database Integrity
Our goal is to develop a scienti c understanding of the kinds of mandatory controls needed to support data integrity. There is general consensus that integrity is an important problem and requires some kind of mandatory controls for its solution. At the same time, inspite of considerable e ort [17, 18, for instance], there is little consensus on what is meant by the two key terms: mandatory con...
متن کاملA Database Integrity Pattern Language
Patterns and Pattern Languages are ways to capture experience and make it reusable for others, and describe best practices and good designs. Patterns are solutions to recurrent problems. This paper addresses the database integrity problems from a pattern perspective. Even if the number of vendors of database management systems is quite high, the number of available solutions to integrity proble...
متن کاملAccommodating Integrity Constraints During Database Design
We address the problem of maintaining the integrity of large knowledge bases using a compile-time transaction modiication technique. The novelty of the approach lies in the adaptation of ideas from Artiicial Intelligence (AI) planning research. Speciically, starting with the observation that solutions to the frame and ramiication problems can be used during database transaction design time, we ...
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ژورنال
عنوان ژورنال: The Computer Journal
سال: 1976
ISSN: 0010-4620,1460-2067
DOI: 10.1093/comjnl/19.2.110