DATA
Data is a representation of a fact, figure, and idea. In computer science, data is anything in a form suitable for use with a computer, in any form, such us numbers, words, images, etc. Then, what does data used for?
Data storing lots of information. Information is a message received and understood, or the value of the data than can be sent as a message. In the next level, we can find out Knowledge as the highest level of data abstraction.
To become a useful information and knowledge, data should be processed, manipulated and extracted. There are any rules to store and arrange the data to facilitate information we need. It called database models. A database is an integrated collection of logically-related records or files consolidated into a common pool that provides data for one or more multiple uses. It can’t content redudancy and duplication data. To manage a huge and integrated data, we have to know about database management.
To build a database, it’s important to know what kind of data will be processed as the input, and what information we want to serve as the output. So, the first step is identify the data, include the usability, type of data and relationship between item data. Then, make the global schema that shows entities and their relationships. To decrease redudancies and duplications, we have to normalized the data. The third step is make physical design, or refine the schema. Finally, it’s time to implementation, monitoring and modification database.
Bibliography :
Teorey, Toby, et al. Database Modelling and Design Fouth Edition. San Fransisco : Elseiver Inc, 2006.
Database. http://en.wikipedia.org/wiki/Database.
Information. http://en.wikipedia.org/wiki/Information.
