Question

Which column is the combination of composite key

Answer 1

Explanation:

A composite unique key is a unique key made up of a combination of columns. Oracle creates an index on the columns of a unique key, so a composite unique key can contain a maximum of 16 columns. To define a composite unique key, you must use table_constraint syntax rather than column_constraint syntax.

Answer 2

Answer:

A primary key having two or more attributes is called composite key. It is a combination of two or more columns. Above, our composite keys are StudentID and StudentEnrollNo. The table has two attributes as primary key.