Thus it does not follow the First Normal Form. In the studentsrecord table, you can see that the course column has two values. Now you will understand the First Normal Form with the help of an example.īelow is a students’ record table that has information about student roll number, student name, student course, and age of the student. The First normal form disallows the multi-valued attribute, composite attribute, and their combinations.It must hold only a single-valued attribute. Here, atomicity states that a single cell cannot hold multiple values.A table is referred to as being in its First Normal Form if atomicity of the table is 1.Now let's understand the types of Normal forms with the help of examples. It is a systematic technique of decomposing tables to eliminate data redundancy (repetition) and undesirable characteristics like Insertion, Update, and Deletion anomalies.Īlso Read: The Ultimate Guide on SQL Basics Normalization organizes the columns and tables of a database to ensure that database integrity constraints properly execute their dependencies. It is a multi-step process that sets the data into tabular form and removes the duplicated data from the relational tables. Normalization also helps to organize the data in the database. Normalization is the process to eliminate data redundancy and enhance data integrity in the table.
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