Answer:
Nominal
Explanation:
- So while singing the question, let's further move to the answer. So let's see here and there.
- The first option is B. S, which corrects gross sectional data, And the 2nd 1 of Nominal, C. Is correct nominal. So here are the buddha points which are given in the question.
- The first one, option B is correct cross-sectional data, And the 2nd 1, is option C. Is correct nominal.
To learn more about it, refer
to brainly.com/question/25458754
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Answer:
You will get compile error
Explanation:
Answer:
b. foreign key
Explanation:
In the database world, a foreign key is a field on one table and a primary key for another table. The purpose of a foreign key is to provide linkages between two or more tables. Given two tables A and B, and making A the point of reference, a primary key is a field that is unique in A while a foreign key is unique in B.
On another hand, a composite primary key is a combination of two or more fields/columns on database table that can be used to uniquely identify each row in the table.
In the database lingua, what we have is a unique key not a distinct key, though the two words are similar in meaning.
A duplicate key is used when an information may be repeatedly entered on a table.
So the correct option is a foreign key.
