First Normal form in DBMS

Let’s study Database First(1st) Normal form and repeating groups.
What is the first normal form?
A relation/table is in the first normal form if it does not contains repeating groups.
What is a repeating group?
A repeating group is a group of two or more rows/records for an instance of an entity.

Example of first normal form

Here, Roll No 2 is the repeating group because Roll number 2 is for only one instance of an entity student.

How to convert a table into the first normal form?

We will remove the repeating groups;

Excercise 1NF to 5NF

Example: 1NF

FIRST NORMAL FORM

Topic Covered

Database First(1st) Normal form and repeating groups.

normal forms in DBMS with examples.
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Read Tutorials about Normalization in DBMS

1. First Normal form in DBMS
2. Second normal form Examples in DBMS
3. Third normal form
4. Boyce-Codd Normal Form (3.5 NF)
5. Fourth Normal Form
6. Fifth Normal Form (5NF)