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Which method of access uses key transformation? A Hash method of access uses key transformation.
What is a candidate key? Minimal super keys are known as candidate keys.
Consider the two relations given below Given that A is the primary key of R, D is the primary key of S and there is a referential integrity among S.A and R.A, discuss all
What are the properties in a relation ? In a relation Ordering of rows is immaterial and No two rows are identical.
What is the use of group by clause? Group by clause is used to apply aggregate functions to a set of tuples. The attributes given in the group by clause are used to
Explain in details about Data Sharing
Types of data independence Data independence can be classified into the following two types: Physical Data Independence: This means that for any change made in the physi
multiplicity constarin
Which database level is closest to the users? External database level is closest to the users.
discuss the purpose of the concurrency control?
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