Active database systems extend functionality of traditional database systems with powerful mechanisms of triggers (or active rules) support. Triggers provide a uniform and convenient base that can be used for realization of internal DBMS functions, such as support of integrity constraints, ...
database design/ C6160 Database management systems (DBMS)A major problem in database design is to analyze and model the actual implementation process. The objective typically is to minimize the cost, subject to operating constraints that may be effective. One such model was developed and reported...
The relational tables thus obtained were implemented on a commercial Database Management System (DBMS). The functional constraints and application interfaces were then built using Structured Query Languages (SQL) and commercial application interface tools. Subsequent sections describe the functional models, ...
The technology constraints that made this technique necessary have now been lifted. These skeleton files *fli.pkb are no longer shipped with the product.Multilingual SupportSeveral entities in the HRMS schema provide Multilingual Support (MLS), where translated values are held in _TL tables. For ...
Slice and Dice View of Sales Figure 13.14 Facts and dimensions represented by physical tables in data warehouse DB Fact table related to each dimension table (M:1) Fact and dimension tables related by foreign keys Subject to the primary/foreign key constraints ...
从逻辑设计导出的数据库结构是DBMS能接受的数据库定义,这种结构 有时也称为逻辑数据库结构。 逻辑结构设计是将概念结构转换为某个DBMS所支持的数据模型, 并对其进行优化。数据库物理设计 物理设计也分为两个部分:物理数据库结构的选择和逻辑设计中程 序模块说明的准确化。这一阶段的工作成果是一个完整的能实现的...
Active database systems extend functionality of traditional database systems with powerful mechanisms of triggers (or active rules) support. Triggers provide a uniform and convenient base that can be used for realization of internal DBMS functions, such as support of integrity constraints, ...
Apart from satisfying the database consistency constraints, transaction executions must also satisfy these timing constraints. The goal of transaction and query processing in real-time databases is to maximise the number of successful transactions in the system. This paper reports on the design, ...
The design of an active DBMS for a particular application entails the design of schema for that application as well as ECA rules that correspond to business rules, constraints, invariants, and situations to be monitored in that application. This paper concentrates on: i) architecture and ...
Preference SQL extends standard SQL by a preference model based on strict partial orders, where preference queries behave like soft selection constraints. A variety of built-in base preference types and the powerful Pareto accumulation operator to construct complex preferences...