Answer to Question 1
A table is in the first normal form (1NF) if it contains no repeating groups. It is in the second normal form (2NF) if it is in the first normal form and every non-key attribute is fully dependent on the entire primary key. Finally, a table is in the third normal form (3NF) if it is in the second normal form and no non-key attribute is dependent on another non-key attribute.
Answer to Question 2
Constraints are rules that apply to associations: generalization, a patient can be issued many hospital cards but only one card can be valid at any given time.
Blood glucose measurement. A postprandial test may be self-administered. (a) A lance pierces the ski
Retinopathy. Illustration of a normal retina (left) and a diseased retina (right). The diseased reti
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Average Normal Blood Pressure Readings
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Poverty comes in many forms. Families who go into debt to buy possessions squeak by month after ...