Data Independence
Explore the concept of data independence in database systems to understand how database schemas can be modified at different levels without impacting user views or application programs. This lesson explains logical and physical data independence using the three-schema architecture and highlights the challenges in achieving logical data independence.
We'll cover the following...
We'll cover the following...
Data independence is defined as a property of the database management system that helps to change the database schema at one level of a database system without changing the schema at the next highest level. The three-schema architecture can be used to further explain the concept of data independence. We outline the two types of data independence:
1. Logical data independence
The ability to ...