MS SQL Server is a relational database management system (RDBMS) was developed by Microsoft. SQL stands for structured query language which used to storing, manipulating and retrieving data in databases. SQL Server is case-insensitive so you can write in uppercase or lowercase. We will learn three Most Usable Commands in SQL Server. 1) DDL - Data Definition Language 2) DML - Data Manipulation Language 3) DCL - Data Control Language The below SQL Server tutorial will help you to learn MS SQL server basics.