Question

Consider the following relation with functional dependencies as shown below.R{sno,sname,age,cno,cname,group}
R(A,B,C,D,E,F)
A-B,C
C-F
D-E
which normal form is the relation R is in?

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Answer 1

Answer:Prerequisite – Database normalization and functional dependency concept.

Normalization is the process of minimizing redundancy from a relation or set of relations. Redundancy in relation may cause insertion, deletion and updation anomalies. So, it helps to minimize the redundancy in relations. Normal forms are used to eliminate or reduce redundancy in database tables.

1. First Normal Form –

If a relation contain composite or multi-valued attribute, it violates first normal form or a relation is in first normal form if it does not contain any composite or multi-valued attribute. A relation is in first normal form if every attribute in that relation is singled valued attribute.

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Answer 2

The given functional dependencies are as shown:

R {sno, sname, age, cno, cname, group} = R(A,B,C,D,E,F)

A - B, C

C - F

D - E

The relation R is in the first normal form.

• Here, as we can see that in the relation R, sno. is denoted by A, sname is denoted by B, age is denoted by C, cno. is denoted by D, cname is denoted by E, group is denoted by F.
• According to the definition of the first normal form, there should not be any partial dependencies of the non-prime attributes on the prime attributes. All non-prime attributes should be fully functionally dependent on the prime attributes.
• Here, all the functional dependencies given in the question fully satisfy the criteria for a relationship to be in the first normal form.

• Hence, the relation is in its first normal form.

To learn more about Normalization and Normal forms, refer to these answers:

https://brainly.in/textbook-solutions/q-normalization-various-forms-normalization

https://brainly.in/question/8596389

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