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exercise solution
A super key is an attribute or set of attributes used to recognize the records uniquely in a relation. For instance, in the Relation PERSON defines earlier PERSON_ID is a super
The Maximum no of key fields that can be used in a header is?? 50
What is it ?
draw er diagram using entities crop,employee,department,plot,cultivation plan,machinery,seed,fertilizer
Explanation on Data Sharing?
Question 1 Draw a Data Flow Diagram for a University scenario Question 2 Discuss the following with suitable examples Relational Algebra Operators Database Pla
what benefit can a company gain by managing its own infrasture and services
Discuss deferred update technique of recovery. What are the advantages? Ans: The deferred update methods do not physically update the database on disk till after a transact
When is a transaction rolled back? Any changes that the aborted transaction made to the database must be uncompleted. While the changes caused by an aborted transaction have be
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