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Explain data abstraction?
Data abstraction Data abstraction is a methodology in which enables us to isolate how a compound data object is utilized from the details of how it is constructed from more primitive data objects.
The File Based System File based systems are an early attempt to computerise the manual filing system. For example, a manual file can be set up to hold all the correspondence r
WHAT IS DATABASE TECHNOLOGIES
Why Like predicate used for? LIKE predicate: The LIKE predicate searches for strings in which have a certain pattern.
A practice called Perfect Pets provides private health care for domestic pets throughout America. This service is provided through various clinics located in the main cities of Ame
Isolation or Independence : The isolation property shows that the updates of a transaction should not be visible till they are committed. Isolation assurance that the progresses of
Normal 0 false false false EN-US X-NONE X-NONE
Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department.
What is schema
Describe the types of Inheritance 1. Single inheritance 2. Multiple inheritance 3. Hierarchical inheritance 4. Multilevel inheritance
need to get answer for questions 3&4 on this page in part 1
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