chapter seven: STORING ORGANIZATIONAL INFORMATION - DATABASE

1. FUNDAMENTAL CONCEPTS OF THE RELATIONAL DATABASE MODEL

A relational database is a core, a system for storing and using data based upon the relationships among the elements of data. 

Different as databases may be in size, they are generally always structured according to one of three database models:

Relational = Nowadays, new installations of database management systems are almost exclusively of the relational type. Organizations that

already have a major investment in hierarchical or network technology

may add to the existing model, but groups that have no need to maintain

compatibility with “legacy systems” nearly always choose the relational

model for their databases.

Hierarchical = Hierarchical databases are aptly named because they have

a simple hierarchical structure that allows fast data access. They suffer

from redundancy problems and a structural inflexibility that makes database modification difficult.

Network = Network databases have minimal redundancy but pay for that

advantage with structural complexity.

A cube is one way to illustrate relations among data as it helps to visualize data intersections. While it is easiest for us to picture a three-dimensional cube, a relational database stores data in many dimensions. 

2.THE ADVANTAGES OF RELATIONAL DATABASE

increased flexibility      

increased information security   

 increased information integrity

reduced information redundancy

 increased scalability and performance

3. DATABASE MANAGEMENT SYSTEM & RELATIONSHIP WITH WEBSITE

   - A Database Management System (DBMS) is a set of programs that enables you to store,modify, and extract information from a database.

- It also provides users with tools to add, delete, access, modify, and analyze data stored in one location.

-  A group can access the data by using query and reporting tools that are part of the DBMS or by using application programs specifically written to access the data. 

- DBMS also provide the method for maintaining the integrity of stored data, running security and users access, and recovering information if the system fails

- Many DBMS also include a graphics component that enables you to output information in the form of graphs and charts. Database and database management system are essential to all areas of business, they must be carefully managed.

Consider for example, a company selling sports cars. A database is created with information on each of its currently available cars e.g. make, model, engine details, year, a photograph, etc. A visitor to the website clicks on Porsche, the visitor enters the price range that they are interested in and hits 'Go'. The visitor is presented with information on available Porsche cars in their price range and an invitation to purchase or request more information from the company. The company has the ability to add new cars to the database, remove them or modify existing entries - this is achieved via a secure administration area on the website.

customer can click faster and the other page can appear as far as possible.

this is an example of website that people can surfing the internet. Google, Mozilla, Explore and etc.

4. WHY ORGANIZATION WOULD WANT TO INTEGRATE ITS DATABASE?

Data integration refers to the organization’s inventory of data and information assets as well as the tools, strategies and philosophies by which fragmented data assets are aligned to support business goals.

company want to integrate its database because they will connect,communicate,dealing and having relation with its customer everyday. Everyday its customers will open the webpage and search anything appear on the page. Therefore, if the product still available or not available the supplier must inform the customers immediately.Publish the information on the web page to make the customers realize that the product exist or not in the market. Then, when the customers got information they will not too disappointed and not waiting too long. Customers satisfy, the business relationship between sellers and customers will be good.