Answer Posted / vish

The answer provided by NK is absolutely correct but we
should be very careful whil choosing the alternate index as
it may not be Unique. e.g. in the example given by NK, the
Emp# will always be Unique within a company but many many
employees can have the same name. So if we declare Emp_name
as AIX (i.e. alternate Index) and then use it for fetching
data then we may end up in multiple rows and hence we may
need additonal logic to arrive at the desired unique record.

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