Chapter10(pdf) - KFUPM Open Courseware
Chapter10(pdf) - KFUPM Open Courseware
Chapter10(pdf) - KFUPM Open Courseware
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Examples of FD constraints<br />
• Social security number determines employee<br />
name<br />
• SSN -> ENAME<br />
• Project number determines project name and<br />
location<br />
• PNUMBER -> {PNAME, PLOCATION}<br />
• Employee ssn and project number determines<br />
the hours per week that the employee works on<br />
the project<br />
• {SSN, PNUMBER} -> HOURS<br />
Copyright © 2007 Ramez Elmasri and Shamkant B. Navathe Slide 10- 21
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