Categories of Data Models

Many data models have been proposed, which we can categorize according to the types of concepts they use to describe the database structure. High-level or conceptual data models provide concepts that are close to the way many users perceive data, whereas low-level or physical data models provide concepts that describe the details of how data … Read more

Data Models, Data abstraction in DBMS

Data abstraction Data abstraction generally refers to the suppression of details of data organization and storage, and the highlighting of the essential features for an improved understanding of data Data model A data model a collection of concepts that can be used to describe the structure of a database provides the necessary means to achieve … Read more