1NF should not contain repeating columns.

Second Normal Form (2NF) is based on the concept of

Second Normal Form applies to relations with Only Single keys

Second Normal Form applies to relations with composite keys, that is, relations with a primary key composed of two or more attributes.

A relation with a single-attribute primary key is automatically in at least 2NF.

If the proper subset of candidate key determines non-prime attribute, it is called Full dependency.

A relation that is in First Normal Form and every non-primary-key attribute is fully functionally dependent on the primary key, then the relation is in

AB -> C (جايه في الامتحان بكره ان شاء الله)

If the following functional dependencies in relation R (A, B, C, D ) , AB -> C , BC -> D

Third Normal Form [3NF] A relation that is in First and Second Normal Form and in which no non-primary-key attribute is transitively dependent on the primary key,

If A->B and B->C are two FDs then A->C is called transitive dependency.

The normalization of 2NF relations to 3NF involves the

If a transitive dependency exists, we remove the transitively dependent attribute(s) from the relation by placing the attribute(s) in a new relation along with a copy of the determinant.

2NF is considered adequate for normal relational

… is a software used to manage data from a database.

popular databases are

… is a system that enables you to store, modify and retrieve data in an organized way. It also provides security to the database

refers to the process of identifying a user.

refers to the process of determining what a user can do.

DBMS provides many operations e.g. creating a database, storing in the database, updating an existing database, delete from the database.