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An instance of relational schema R (A, B, C) has distinct values of A including NULL values. then A is a candidate key or not?
If relational schema R (A, B, C) has distinct values of A including NULL values A is not a candidate key.
Determine the Objectives of object oriented design provide an overview of object oriented design; partitioning system to subsystems; describe how a software desig
What is deadlock? How can it be avoided? How can it be resolved once it occurs? Deadlock happens when two transactions are each waiting on a resource that the other transaction
What is RDBMS terminology for a row? A tuple is a RDBMS terminology for a row
Type of views : Simple views and Difficult Views Feature Simple Views Complex Views Number of tables One
Define canonical cover? A canonical cover Fc for F is a set of dependencies like F logically implies all dependencies in FC and Fc logically shows all dependencies in F.
Explain Candidate Key and Super Key A super key is a set of one or more than attributes that, taken collectively, permits us to identify uniquely a tuple in the relation. Wher
3NF Normal Form A relation schema R is in 3NF if it is in 2NF and for each FD X A either of the following is true X is a Super-key of R. A is a prime attribute of R
(a) Explain the three types of potential mistake which could occur if concurrency control is not properly enforced in the database system. Support your answer with appropriate ex
Relational Algebra is a set of basic operations used to influence the data in relational model. These operations allow the user to specify basic retrieval request. The result of re
Enumerate or state the steps in creating a relevant database of a shop.
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