SHASHANGKA SHEKHAR'S BLOG

Author, TechWriter

What are different normalization forms?

1NF: Eliminate Repeating Groups
Make a separate table for each set of related attributes, and give each table a primary key. Each field contains at most one value from its attribute domain.

2NF: Eliminate Redundant Data
If an attribute depends on only part of a multi-valued key, remove it to a separate table.

3NF: Eliminate Columns Not Dependent On Key 
If attributes do not contribute to a description of the key, remove them to a separate table. All attributes must be directly dependent on the primary key Read More

What is normalization?

Database normalization is a data design and organization process applied to data structures based on rules that help build relational databases.

In relational database design, the process of organizing data to minimize redundancy. Normalization usually involves dividing a database into two or more tables and defining relationships between the tables.

The objective is to isolate data so that additions, deletions, and modifications of a field can be made in just one table and then propagated through the rest of the database via the defined relationships.

What is RDBMS?

Relational Data Base Management Systems (RDBMS) are database management systems that maintain data records and indices in tables.

Relationships may be created and maintained across and among the data and tables. In a relational database, relationships between data items are expressed by means of tables.

The History of SQL Server

SQL stands for Structured Query Language and is pronounced either ess-que-el orsequel. It is the language used by relational database management systems (RDBMS) to access and manipulate data and to create, structure and destroy databases and database objects. Read More