A computerized store house of data that provide a standardized way for locating, adding, and changing data.
1. Object-oriented databases
Unlike rational databases ,uses tubular structures , object oriented databases attempt to model the structure of a given data set that as closely as possible. In doing so , object-oriented databases tend to reduce the appearance of duplicated data and the complexity of query structure often found in rational database
2. Rational databases
Organizes informations into tables where each column represents the field of informations that can be stored in a single record. Each row in the table corresponds to a single record. A single database can have many tables and a query languages is used to access the data.