Sure, before we dive into an example, let's first understand what 2NF (Second Normal Form) is.

A relation is in 2NF if it is in 1NF and every non-prime attribute is fully functionally dependent on the primary key. This means that there should be no partial dependency of any column on the primary key.

Let's consider an example:

Suppose we have a relation Student_Course with the following attributes:

Student_Course(Student_ID, Course_ID, Student_Name, Course_Name)

Here, the primary key is (Student_ID, Course_ID) because a student can enroll in multiple courses and a course can have multiple students.

Now, in this relation, Student_Name is dependent on Student_ID and Course_Name is dependent on Course_ID. This is a partial dependency, which violates the 2NF rule.

To make this relation comply with 2NF, we can break it down into two relations:

1. Student(Student_ID, Student_Name)
2. Course(Course_ID, Course_Name)

Now, each non-prime attribute (Student_Name in the Student relation and Course_Name in the Course relation) is fully functionally dependent on the primary key. Therefore, these relations are in 2NF.

Question

Sure, before we dive into an example, let's first understand what 2NF (Second Normal Form) is.

A relation is in 2NF if it is in 1NF and every non-prime attribute is fully functionally dependent on the primary key. This means that there should be no partial dependency of any column on the primary key.

Let's consider an example:

Suppose we have a relation Student_Course with the following attributes:

Student_Course(Student_ID, Course_ID, Student_Name, Course_Name)

Here, the primary key is (Student_ID, Course_ID) because a student can enroll in multiple courses and a course can have multiple students.

Now, in this relation, Student_Name is dependent on Student_ID and Course_Name is dependent on Course_ID. This is a partial dependency, which violates the 2NF rule.

To make this relation comply with 2NF, we can break it down into two relations:

1. Student(Student_ID, Student_Name)
2. Course(Course_ID, Course_Name)

Now, each non-prime attribute (Student_Name in the Student relation and Course_Name in the Course relation) is fully functionally dependent on the primary key. Therefore, these relations are in 2NF.

Knowee AI · Accepted Answer

Sure, before we dive into an example, let's first understand what 2NF (Second Normal Form) is.

A relation is in 2NF if it is in 1NF and every non-prime attribute is fully functionally dependent on the primary key. This means that there should be no partial dependency of any column on the primary key.

Let's consider an example:

Suppose we have a relation Student_Course with the following attributes:

Student_Course(Student_ID, Course_ID, Student_Name, Course_Name)

Here, the primary key is (Student_ID, Course_ID) because a student can enroll in multiple courses and a course can have multiple students.

Now, in this relation, Student_Name is dependent on Student_ID and Course_Name is dependent on Course_ID. This is a partial dependency, which violates the 2NF rule.

To make this relation comply with 2NF, we can break it down into two relations:

1. Student(Student_ID, Student_Name)
2. Course(Course_ID, Course_Name)

Now, each non-prime attribute (Student_Name in the Student relation and Course_Name in the Course relation) is fully functionally dependent on the primary key. Therefore, these relations are in 2NF.

What is an example of a 2NF relation?

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