Structure Query Language

SQL is a database computer language designed for the retrieval and management of data in a relational database. SQL - stands for Structured Query Language. Actual name is SEQUEL – Structured English Query Language. It was first developed at IBM in the early 1970. It became the industry standard of relational database querying languages in 1980. In 1987 Computerworld magazine published an article about SQL after that only it boomed. High traffic websites including Facebook, Twitter, and YouTube use SQL to handle billions of user interactions.

Key elements of Database (Creation, Alteration etc.,)
Keys
Select Queries
Joins & Type of joins
Relationship between Tables

Fact and Dimension Table Types
Stored Procedure
Comments & Operators
DDL basics
DML basic