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Suppose you have a reference table that looks up numeric scores and translates them into letter grades, for example, one key / value pair is
Suppose you have a reference table that looks up numeric scores and translates them into letter grades, for example, one keyvalue pair is At What is the primary key attribute in this table? There is no primary key; the composite key is the combination of both attributes. There is no primary key because none is needed. The primary key is the letter grade.
Suppose you have a reference table that looks up numeric scores and translates them into letter grades, for example, one keyvalue pair is At
What is the primary key attribute in this table?
There is no primary key; the composite key is the combination of both attributes.
There is no primary key because none is needed.
The primary key is the letter grade.
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