数据库中域完整性的设计与应用

Design and Application of Database Domain Integrity

数据完整性约束在数据库设计过程中至关重要,是保障数据正确、一致的有效机制。其中,域完整性是保证数据完整性的重要约束之一,包括CHECK约束、默认值约束、默认值对象和规则等。笔者旨在深入探讨实现域完整性的方法和手段,详细介绍实现域完整性的不同方法和具体运用,从而使学习者能够掌握这些方法,实现数据库的完整性约束设计。

Data integrity constraint is very important in the process of database design, and it is an effective mechanism to e nsure data correctness and consistency. Among them, domain integrity is one of the important constraints to ensure data integrity, including CHECK constraints, default value constraints, default value objects and rules. The purpose of this paper is to explore the methods and means to achieve domain integrity, and introduce in detail the different methods and specific applications to achieve domain integrity, so that learners can master these methods and achieve database integrity constraints design.