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, ...
diagrams which are then mapped to a relational model. 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 to...
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...
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 ...
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, ...
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...
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 ...
However, the facility should not impose unreasonable or too much constraints on the software vendor or the contractor. It is not uncommon for organizations to dictate certain architecture or configuration that is in conflict with the way the system has been designed. As far as possible, they ...
5.The method of claim 4 wherein said element of querying said collection as a relation comprises:unnesting said collection into a relational queriable object comprising a first column wherein each row in said first column corresponds to a single member of said collection; andquerying said relatio...