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Database Systems 6th Edition by Ramez Elmasri, Shamkant B. Navathe
النسخة 6الرقم المعياري الدولي: 0136086209Database Systems 6th Edition by Ramez Elmasri, Shamkant B. Navathe
النسخة 6الرقم المعياري الدولي: 0136086209 تمرين 1
Consider the following relation:
R (Doctor#, Patient#, Date, Diagnosis, Treat_code, Charge)
In this relation, a tuple describes a visit of a patient to a doctor along with a treatment code and daily charge. Assume that diagnosis is determined (uniquely) for each patient by a doctor. Assume that each treatment code has a fixed charge (regardless of patient). Is this relation in 2NF? Justify your answer and decompose if necessary. Then argue whether further normalization to 3NF is necessary, and if so, perform it.
R (Doctor#, Patient#, Date, Diagnosis, Treat_code, Charge)
In this relation, a tuple describes a visit of a patient to a doctor along with a treatment code and daily charge. Assume that diagnosis is determined (uniquely) for each patient by a doctor. Assume that each treatment code has a fixed charge (regardless of patient). Is this relation in 2NF? Justify your answer and decompose if necessary. Then argue whether further normalization to 3NF is necessary, and if so, perform it.
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From the question's text, we can infer t...
Database Systems 6th Edition by Ramez Elmasri, Shamkant B. Navathe
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