浅析VFP数据库完整性约束

On the Integrity Restraint in VFP Database

数据库完整性是确保数据库中的数据正确、一致和唯一的必要条件,因此也是开发者在开发应用程序时必须考虑的重要环节。本文阐述了使用数据库完整性的重要意义和引用方法,并以VFP为例论述如何使用完整性来约束和防止数据库产生不正确的数据。

The integrity of the database is a necessary condition to guarantee the accuracy,consistency and uniqueness of the data,and an important link that developers should consider for application program of development.The article expounds the significance and reference method to use the database integrity and how to use the integrity for preventing incorrect data in database,take VFP.