【摘要】 关系数据库管理系统都提供数据完整性机制,认识这些数据完整性机制,并在数据库应用开发中加以运用,能有效减轻编程工作量。对目前常用的几种关系数据库管理系统的数据完整性机制进行了总结,帮助应用开发者认识和应用。更多还原

【Abstract】 Cognition and application of the relational database system’s completeness mechanism can effectively reduce programming works in the database application. In this paper, the author summarizes the completeness mechanism of three relational database management systems, which is widely used today. It can help the developers in the database applications.更多还原