Question: Consider the instance of the Students relation shown in Figure 3.1. FIELDS (ATTRIBUTES, COLUMNS) An Instance S1 of the Students Relation 1. Give an example
FIELDS (ATTRIBUTES, COLUMNS)
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An Instance S1 of the Students Relation
1. Give an example of an attribute (or set of attributes) that you can deduce is not a candidate key, based on this instance being legal.
2. Is there any example of an attribute (or set of attributes) that you can deduce is a candidate key, based on this instance being legal?
Field namessid name age gpa 19 3.3 18 3.4 18 3.2 19 3.8 53831Madayan madayan@music11 1.8 12 2.0 login 50000 Dave Jones j davecs 53666 Jones jones@cs 53688 Smith smith@ee 53650 Samath TUPLES RECORDS, ROws) Smith smith 53832 Guldu guldu@musio
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Examples of noncandidate keys include the following name age That gpa can ... View full answer
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