Saturday, April 30, 2011

~ABOUT DATABASES~

Hallo!!!! today we want tell you about databases...
we know you like database...
so, you must know what is databases...


Databases is a collection of integrated data logically related files and record


Need for databases
 ~Individual and organization get advantages to having databases

  1. share: in organizations from one department can be readily shared wiyh others.
  2. security: user are given passwords or access only to the kind of information they need.
  3. less data recundancy: individual department have to create and maintain their own data and recundancy result.
  4. data integrity: when there ae multiple sources of data, each resource may have variations.

Database management

This software called databased management system (DBMS) for creating, modifying and gaining access to database.


DBMS consist of five subsystem:

  1. DBMS engine provides a bridge between logical and physical data view.
  2. Data definition subsystem define the logical structure of a database using a data dictionary or schema.
  3. Data manipulation subsystem provides tools for data maintenance and data analysis.tools include query-by-example and structured query language (SQL).
  4. Application generation subsystem provides tools for creating data entry form withspecialized programming languages.
  5. Data administration subsystem manages the dartabase.database administrations (DBAs) are computer professionals who help define processing right.


so???what you think about database???
that all for today...
see you tomorrow...
bye!!!!

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