Question

A table though cannot have more
than one primary key however
combination of more than one field
can serve as a primary key, a primary
key is so designed is known as

*Composite primary key
*Complex primary key​

Answer 1

Answer:

Primary keys must contain unique values. A primary key column cannot have NULL values. 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.