【摘要】 数据完整性在管理信息系统中至关重要。针对基于Internet/Intranet企业管理信息系统结构,分析了系统访问数据的层次性模型,就数据库的完整性在各个层次上的实现进行了深入探讨,给出了在数据库、业务服务和用户接口三个层次上实现完整性约束的具体方法。更多还原

【Abstract】 Data integrity is of vital importance in the management information system. Inview of the management information system structure based on Internet, the tiered models of theaccess to database are analyzed. Furthermore, discussed in the paper is the realization of thedata integrity at each tier, and the examples for the realization in the three tiers of database,business service and user interface are given too.更多还原