Assignment 6-1Schedule(staffNo, dentistName, patNo, patName, surgeryNo, Date, Time)

Make assumptions:• surgeryNo is the surgery room number.

• staffNo, patNo, and surgeryNo are unique.

• A patient is allowed to have more than one surgery a day.

• Only one surgery can take place in a room at any given time.

• A dentist can perform only one surgery at any given time.

• A dentist is allocated in one surgery room each day.

• But a surgery room can be used by multiple dentists on the same day.

• Date and Time as two separate attributes. Do NOT use Appointment!

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Assignment 6-1surgeryNo, Date ===> staffNoWhat does it mean?A surgery room is reserved for one dentist a day.-0.5

staffNo, Date ===> surgeryNo What does it mean?A dentist is allocated to a specific surgery room for each day.Yes!

staffNo surgeryNo Date Time …

S1011 S15 12-Sep-04 10:00

S1011 S15 12-Sep-04 12:00

S1024 S15 12-Sep-04 14:00

S1011 S14 13-Sep-04 10:00 2

Assignment 6-1

patNo, Date ===> ALLWhat does it mean?A patient can have at most one surgery a day.Usually is true.Not a rule we want to make.

-0.5

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Assignment 6-1

patNo, staffNo ===> ALLWhat does it mean?A patient can see one dentist once, and hence

must see a different dentist each time visiting the clinic.

-0.5

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Assignment 6-1

Candidate keys: staffNo, Date, Time surgeryNo, Date, Time patNo, Date, Time

Must have FDs:staffNo, Date, Time ===> AllsurgeryNo, Date, Time ===> AllpatNo, Date, Time ===> All

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Assignment 6-11.staffNo dentistNamepatNo patName staffNo, Date, Time AllpatNo, Date, Time AllsurgeryNo, Date, Time AllstaffNo, Date surgeryNo

2.staffNo, Date, Time(any one of the three ALL FDs)

3.patNo, Date, TimesurgeryNo, Date, Time

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Quiz2

Change UserName to your UWP UserName first!

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