Petcare Vet Clinic needs to normalise records of appointments. An owner brings their pet to the appointment at a specified date/time with a specific vet. PetType means cat, dog, guinea pig, etc. Booking channel name can be phone, website, Facebook message, email. Below is the Appointment relation Appointment (vetID, vetName (PetID, PetName, PetType, OwnerMobile, OwnerFullName, channelID, channelName, date, time)) Convert the non-normalised relation to 1NF. Identify PKs using underlining, FKs using italics, PFK - underlining+italics. You may not introduce surrogate keys.
Question
Petcare Vet Clinic needs to normalise records of appointments. An owner brings their pet to the appointment at a specified date/time with a specific vet.
PetType means cat, dog, guinea pig, etc.
Booking channel name can be phone, website, Facebook message, email.
Below is the Appointment relation
Appointment (vetID, vetName (PetID, PetName, PetType, OwnerMobile, OwnerFullName, channelID, channelName, date, time))
Convert the non-normalised relation to 1NF. Identify PKs using underlining, FKs using italics, PFK - underlining+italics. You may not introduce surrogate keys.
Solution
First Normal Form (1NF) requires that each attribute of a relation is atomic, meaning it cannot be further divided. It also requires that each tuple (row) of a relation has a unique identifier, known as the primary key.
Given the Appointment relation:
Appointment (vetID, vetName (PetID, PetName, PetType, OwnerMobile, OwnerFullName, channelID, channelName, date, time))
To convert this relation to 1NF, we need to remove the nested relation and ensure each attribute is atomic. We also need to identify the primary key(s) and foreign key(s).
The 1NF relation would look like this:
Appointment (vetID PK, vetName, PetID PK, PetName, PetType, OwnerMobile, OwnerFullName, channelID PK, channelName, date, time)
In this case, vetID, PetID, and channelID are the primary keys (PK) as they uniquely identify each tuple in the relation. There are no foreign keys (FK) in this relation as there are no attributes that refer to primary keys in other relations.
Please note that in a real-world scenario, we would likely have separate relations for Vet, Pet, Owner, and Channel, and the Appointment relation would include foreign keys to these relations. However, based on the given information and constraints, this is the 1NF relation.
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