Question

 Define the following terms as they apply to the relational model of data:
domain, attribute, n-tuple, relation schema, relation state, degree of a relation, relational database schema, and relational database state.​

Answer 1

Answer:

. Domain: Domain is a set of atomic (indivisible) values that can appear in a particular column

in a relational schema. A common method of specifying domain is to specify a data type (integer,

character, floating point, etc...) from which the data values forming a domain can be drawn.

Explanation:

• For example: Consider a relational schema called Student that may have facts about students in a particular course. Consider a fact to be name of the student. Name of a student must be a string. So we can say domain of name is char siring.

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