WHAT IS TRUE ABOUT 2NF?Select one:a. BOTH OF THE ABOVEb. RELATION SHOULD BE IN 1NF.c. ALL ATTRIBUTES OTHER THAN PRIMARY KEY ARE FULLY FUNCTIONALLY DEPENDS ON PRIMARY KEYd. NONE OF THE ABOVE
Question
WHAT IS TRUE ABOUT 2NF?Select one:a. BOTH OF THE ABOVEb. RELATION SHOULD BE IN 1NF.c. ALL ATTRIBUTES OTHER THAN PRIMARY KEY ARE FULLY FUNCTIONALLY DEPENDS ON PRIMARY KEYd. NONE OF THE ABOVE
Solution
To determine what is true about 2NF, we need to evaluate the given options:
a. BOTH OF THE ABOVE: This option is not clear as it does not specify what "both" refers to. It is not a valid answer.
b. RELATION SHOULD BE IN 1NF: This statement is true. In order for a relation to be in 2NF, it must first satisfy the requirements of 1NF.
c. ALL ATTRIBUTES OTHER THAN PRIMARY KEY ARE FULLY FUNCTIONALLY DEPENDS ON PRIMARY KEY: This statement is also true. In 2NF, all non-key attributes must be functionally dependent on the entire primary key.
d. NONE OF THE ABOVE: This option is not correct as both option b and c are true.
Therefore, the correct answer is b. RELATION SHOULD BE IN 1NF.
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