Functional dependencies are a generalization of

Related MCQs

• Relation R with an associated set of functional dependencies, F, is decomposed into BCNF. The redundancy (arising out of functional dependencies) in the resulting set of relations is
• The completeness constraint may be one of the following: Total generalization or specialization, Partial generalization or specialization. Which is the default?
• Functional Dependencies are the types of constraints that are based on             
• Relation dept year(dept name, total inst 2007, total inst 2008, total inst 2009). Here the only functional dependencies are from dept name to the other attributes. This relation is in
• Consider a schema R(A, B, C, D) and functional dependencies A -> B and C -> D. Then the decomposition of R into R1 (A, B) and R2(C, D) is
• Relation dept year(dept name, total inst 2007, total inst 2008, total inst 2009). Here the only functional dependencies are from dept name to the other attributes. This relation is in
• Functional Dependencies are the types of constraints that are based on______
• We can use the following three rules to find logically implied functional dependencies. This collection of rules is called
• There are two functional dependencies with the same set of attributes on the left side of the arrow: A->BC A->B This can be combined as
• Consider a relation R(A,B,C,D,E) with the following functional dependencies: ABC -> DE and D -> AB The number of superkeys of R is: