What is Alternate Key ? Short note on Alternate Key
ALTERNATE KEY :-
A Candidate key which is not the primary key is known as alternate key. For the above example, two candidate key as {CUST-NO } and { CUST-NAME, ADDR }. If the attribute { CUST-NO } is a primary key. The alternate key is { COST-NAME, ADDR}.
Subscribe to:
Post Comments
(
Atom
)
No comments :
Post a Comment