CHAPTER7 :
1. Describe two primary method of intergrating information across multiple database ?.
⊙ The primary method intergrating information across multiple database is a forward intergration takes information entered into a given system and sends it automatically to all downstream systems and process. Secondly, a backward integration takes information to all downstream system and process.
2. Describe the benefit of data-driven web site ?.
⊙ The benefit of data driven website is to allow the website owner to make changes any time, a status website requires a programmer to make update. It useful to when sites offers a greats deal of information, products or services. A static website is requires a programmer to makes updates. This adds an unnecessary layer between the business and its web content, which can lead to misunderstanding and slow turn around and desired changes.
3. Define the fundamental concept of the rational database model ?.
⊙ Fundamental concept of rational database model that have two type , firstly entities and attributes. Entities in the rational database model is the person, place, thing, transactions or event about which information is stored. Attributes also called fields or columns are characteristics or properties of an entity class. Secondly, keys and relationships.
4.Evaluate the advantages of the rational database model .
* Firstly increase flexibility, increase scalability and performance. It database tend to mirror business structures and good database can handle changes quickly and easily. It reduced information redundancy. Redundancy is the duplication of information, or storing the same information in multiple places. Besides, increase information integrity ( quality ) and increase information security.

http://www.teach-ict.com/as_as_computing/ocr/H447/F453/3_3_9/database_design/miniweb/pg8.htm

5. Compare operational integrity constraints and business critical integrity constraints ?.
 Operational integrity constraints are rules that enforce basic and fundamental information based constraints and Business critical integrity constraints are rules that enforce rules vital to an organization success and often require more insight and knowledge than operational integrity constraints.

http://docs.oracle.com/cd/B28359_01/server.111/b28313/constra.htm