What is 1nf in form in dbms?

Answer 1

If you have a table then simply it should not have repeated columns having the same data and it should have primary key.

For Instance:

Table Name=Home

Column Names=Home_primary_key,Table,Chair1,chair2,chair3,chair4,door,window.

If you observe column names ..chair1,chair2,chair3,chair4 are repeated columns

To bring this table to 1NF form we have to have one primary key which is present and should not have repeated columns.

So now our column names would be after applying 1NF.

Home_primary_key,Table,Chairs,Door,Window.