What is Fully Functional dependency?

What is Fully Functional dependency?
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Answer :

It is based on concept of full functional dependency. A functional dependency X Y is full  functional dependency if removal of any attribute A from X means that the dependency does  not hold any more.
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A B C is a set of attributes. The functional dependency is as follows AB -> B AC -> C C -> B a) is in 1NF b) is in 2NF c) is in 3NF d) is in BCNF

Description : A B C is a set of attributes. The functional dependency is as follows AB -> B AC -> C C -> B a) is in 1NF b) is in 2NF c) is in 3NF d) is in BCNF

Last Answer : a) is in 1NF

When is a functional dependency F said to be minimal?

Description : When is a functional dependency F said to be minimal?

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Description : What is Functional Dependency?

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What do you understand by dependency preservation?

Description : What do you understand by dependency preservation?

Last Answer : Given a relation R and a set of FDs F, dependency preservation states that the closure of the union of the projection of F on each decomposed relation Ri is equal to the closure of F. i.e ... ))+ = F+ if decomposition is not dependency preserving, then some dependency is lost in the decomposition

What is join dependency and inclusion dependency?

Description : What is join dependency and inclusion dependency?

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Description : What is Multivalued dependency?

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For a database relation R(a, b, c, d) where the domains of a, b, c, d include only the atomic values. The functional dependency a → c, b → d holds in the following relation (A) In 1NF not in 2NF (B) In 2NF not in 3NF (C) In 3NF (D) In 1NF

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In RDBMS, the constraint that no key attribute (column) may be NULL is referred to as: (A) Referential integrity (B) Multi-valued dependency (C) Entity Integrity (D) Functional dependency

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Consider a schema R(MNPQ) and functional dependencies M→N, P→Q. Then the decomposition of R into R1(MN) and R2(PQ) is ............. (1) Dependency preserving but not lossless join. (2) Dependency preserving and lossless join (3) Lossless join but not dependency preserving (4) Neither dependency preserving nor lossless join.

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Last Answer : Answer: 1

Explain functional dependency with example.

Description : Explain functional dependency with example.

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In computer science, data hazard occurs when (1) pipeline changes the order of read/write access to operands (2) performance loss (3) machine size is limited (4) some functional unit is not fully pipelined

Description : In computer science, data hazard occurs when (1) pipeline changes the order of read/write access to operands (2) performance loss (3) machine size is limited (4) some functional unit is not fully pipelined 

Last Answer : pipeline changes the order of read/write access to operands

Feeling hesitant to take an over-the-counter drug because I know I will develop dependency...do you have any advice?

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Description : What does "jumps off the screen" mean?

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