Define primary key and give one example-01197
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vu eng001 Elementary English.
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vu eng001 Mid Term Solved Past Paper No. 1.
Question 1: Define primary key and give one example.
Answer:
A candidate key chosen by the database designer to act as key is the primary key. An entity type may have more than one candidate keys, in that case the database designer has to designate one of them as primary key, since there is always only a single primary key in an entity type. The primary key can also be defined as the successful candidate key. (Page 82)
