SashaFroyland Profile Answers by SashaFroyland Mar 1st, 2008 Physically they are located in the same table, so I would say #1 - 'conceptual'. This would be implemented via business rules.
Manages's salary details are hidden from employees This is 1. conceptual level of data hiding 2. physical level of data hiding 3. external level of data hiding 4. either 1 or 2
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