what is data independence exactly? give an example
Answer Posted / monika
Data independance:
It includes the isolation of data from application program.
There are 2 types of data independance:
1.Logical data independance:
The ability to change the conceptual schema without
altering the external schema or application programs.
2.Physical data independance:
It is ability to change the internal schema without
changing the conceptual or external schema.
Is This Answer Correct ? | 4 Yes | 4 No |
Post New Answer View All Answers
How to assign values to data fields in record variables?
How to use "if" statements on multiple conditions?
What is catalog in Oracle?
How do I limit the number of rows returned by an oracle query after ordering?
How to invoke the data pump export utility?
List out the difference between commit, rollback, and savepoint?
What do you mean by merge in oracle and how can you merge two tables?
How to retrieve the count of updated rows?
How to convert raw data type into text in oracle? Explain
What is a named program unit?
What are the numeric comparison operations?
What are the restrictions on external table columns?
How to run create database statement again?
Explain the use of owner option in exp command.
What are the logical operations?