Question

A table can only have only one primary key

Answer 1

A table can have only one primary key, which may consist of single or multiple fields. When multiple fields are used as a primary key, they are called a composite key. If a table has a primary key defined on any field(s), then you cannot have two records having the same value of that field

Answer 2

Explanation:

A table contains only one primary key . It cannot contain null value and this column consist of single or multiple column.