System Analysis and Design
Advantages of Relational Database Management systems are

All of these
Flexibility, of relating different logical files
Data independence since it allows the database to grow by adding new attributes and relations.
None of these
Security controls can be more easily implemented.

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System Analysis and Design
Cost-Benefit analysis

None of these
estimates the hardware and software costs
All of these
evaluates the tangible and non-tangible factors
compares the cost, with the benefits, of introducing a computer-based system

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