Question

Which of the following best describes the purpose of a primary key?

Group of answer choices

a.To support business processes across the organization

b.To provide business information, but are not required to build a database

c.To create the relationship between two tables

d.To ensure that each row in the table is unique

Answer 1

Correct answer:

Option(d) or To ensure that each row in the table is unique is a correct answer because an each record maintained is uniquely identifies.In other words these primary key is unique method of identifying record in the table. Therefore, each row in the table is unique.

Incorrect answers:

Option(a) or To support business processes across the organization is incorrect answer because primary key is a unique method of identifying record in the table.

Option(b) or To provide business information, but are not required to build a database is incorrect answer because it helps to identifies the each record uniquely.

Option(c) or To create the relationship between two tables is incorrect answer because primary key helps to ensure that each row in the table is unique.

So correct answer is option (d)