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Define an abstraction by which relationships are treated as higher level entities
Ans: Aggregation.
It is an abstraction by which relationships are treated as higher level entities Aggregation. (In ER diagram, aggregation is utilized to denote a relationship as an entity set.)
Define the following constraints for the table client. (i) BAL_DUE must be at least 1000. (ii) NAME is a unique key. (i)ALTER TABLE CLIENT ADD CONSTRAINT CLIENT_BAL_DUE_C1
What is meant by mean time to failure? The mean time to failure is the amount of time that the system could run continuously without failure.
difference between MIS and DSS
how to construct labelled precedence graph for view serialiability.please explain insteps with one solved examples
Why did SAP introduce the extended star schema? Explain why it is reported to be better than the traditional schema model?
What is first normal form? The domain of attribute must contain only atomic (simple, indivisible) values.
Consider the subsequent relation Professor (Pfcode, dept, head, time) It is assumed that (i) A professor can work in much more than one
1. Create a subroutine that does the remote blast on the file protein.fa. 2. Pass that returned files from the blast to another subroutine that parses the output and sends it to
What is the role of ORDER By Clause? ORDER BY clause: The ORDER BY clause permits you to sort the records in your result set. The ORDER BY clause can just be used in select s
Describe Database state in details? Database state: The actual data within the database at a particular moment in time is known as a database state.
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