Database Management Systems.

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Data is recorded on the phenomena / the fact that there is or there. or could also be said is that the data reflect the facts. data menngenai important facts must be recorded and organizations manage with good management that can be used efficiently so that the support operations and control data.

1. file-based applications
file-based application system is a collection of application programs that provide services to the user where each program to manage their own data. but the file-based application has a flaw, like a very bad control, formats, etc. that are not compatible.

2. database management system
database is a collection of data (elementary) that are logically related in fact represents a structured in a particular domain name to support a particular application state juga.basisdata describe the organization, when there are changes that alter the organization's state changes must be made to the data stored in the database.
database management system is software that manages the database access. its function is to provide a basis for management information systems.
The main purpose of a database management system is to provide a more comfortable environment for efficient storage and retrieval of data from the database.

3. development needs of database
functional needs which includes models, object, use, using a variety of other causes increased need for system features as follows.
a. high availability
b. high reliability
c. high throughput
d. Low response time
e. long life time
f. security

4. database usage
there are four types of database users, namely:
1. application programmer
2. advanced users
3. specialized user
4. ordinary user
The main role of database management systems is to provide an abstract view hides the details of storage and manipulation of data physically.
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