1. DateTrack adds the dimension of time to an application s database.
The value of a DateTracked record depends on the date from which
you are viewing the data. For example querying an employee s annual
salary with an effective date of 12 JUL 1992 might give a different
value than a query with an effective date of 01 DEC 1992. However
the application and the user see the employee s pay as a single record.
For more information to how to use it look at this document available in Oracle web site
Implementing Oracle HRMS (US)