Relational Data Model

Question 1

What is a domain?

Answer 1

A domain D is a set of atomic values. By atomic we mean that each value in the domain is indivisible as far as the relational model is concerned.
A domain is given a name, datatype and format.

Question 2

What is an Attribute

Answer 2

An attribute is the name of a characteristic.

Question 3

What is a tuple

Answer 3

A single row in a table representing an object is a tuple

Question 4

What does the first normal form say?

Answer 4

It says that composite and multivalued attributes are not allowed in a tuple.