What is "composite-key"
Composite key is the use of a primary key in a table of a Relational Databank that contains more than one column.
When the primary key has only one column it is called simple-key, rather than composite.
Composite key is the use of a primary key in a table of a Relational Databank that contains more than one column.
When the primary key has only one column it is called simple-key, rather than composite.