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, ...
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 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, ...
Constraints Product Family Group Constraints Diagnosis of Visual Guidelines Product Groups Validation Tool (Sanity Checker) Diagnosis of Dropped Products Checklist for Optimization Results Diagnosis Monitoring Batch Processes Overview Batch Process Failure Global Validation Issues Sending Data in Data Files As...
A real-time database system is a database system in which transactions have explicit timing constraints such as deadlines. Apart from satisfying the database consistency constraints, transaction executions must also satisfy these timing constraints. The goal of transaction and query processing in real-...
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...
Available protections include data types, referential constraints, uniqueness constraints, range checking, and application-specific logic. Application-specific logic can be implemented within the database in stored procedures and triggers, where appropriate. This calls for inspection of application source ...
This unified framework for types, constraints, and queries is a central aim of the TQL project, but its further discussion is out of the scope of this paper. In this paper we describe the foundations of some focal aspects of our imple- mentation of the TQL evaluator. The implementation ...