Define the following terms: (a) Relation (b) Tuple (c) Attribute (d) Domain

Q. Define the following terms:

(a) Relation

(b) Domain

(c) Tuple

(d) Attribute

(e) Degree

(f) Cardinality

Answer :-

(a) Relation :- Data arrange in row and columns and having certain properties.

(b) Domain :- This is a pool of values from which the actual values appearing in a given column are drawn.

(c) Tuple :- A row of a relation is known as tuple.

(d) Attribute :- A column of a relation is known as attribute.

(e) Degree :- The number of attributes in a relation is called Degree.

(f) Cardinality :- The number of rows in a relation is known as Cardinality.