A ________ is a column (or set of columns)which have a unique value that cannot be duplicated in other rows?
A)Primary key.
B)Query.
C)SQL statement.
D)Lookup value.

Name: A ________ is a column (or set of columns)which have a unique value that cannot be duplicated in other rows? A)Primary key. B)Query. C)SQL statement. D)Lookup value.
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Question

Quizplus · Accepted Answer

A primary key is a column or set of columns in a table that uniquely identifies each row. No two rows can have the same primary key value.

A ________ Is a Column (Or Set of Columns)which Have