When implementing the physical-level design, for secondary keys, you must ensure that it is possible to retrieve data rapidly on the basis of a value of the ____ key.?
The answer is secondary key. It is created on a field that
you would like to be indexed for quicker searches. An entity may have one or
more selections for the primary key. Jointly these are recognized
as candidate keys. One is designated as the primary key.
Those not designated are known as secondary keys.
