Knowing SQL is mandatory for any IT professional. Following are very comprehensive tutorials on SQL which are  easy to understand.

Its impossible to fully appreciate SQL without knowing a bit about Databases. Tutorial 1 to 5 Focus on Database Concepts. Its highly recommended you do not skip the tutorials.

Refer the tutorials sequentially one after other to maximise effectiveness of the training material.

The tutorials have many code examples. Its recommended you practise them.

Database Design

• Tutorial 3 - Introduction to Database Design
• Tutorial 4 - Normalization
• Tutorial 5 - ER Modeling

SQL Basics

• Tutorial 6 - Creating a Database
• Tutorial 7 - SELECT Statement
• Tutorial 8 - WHERE Clause
• Tutorial 9 - Insert Into
• Tutorial 10 - Delete & Update

Data Sorting

• Tutorial 11 - OrderBy , Desc &  Asc
• Tutorial 12 - Group By
• Tutorial 13 - Wildcards
• Tutorial 14 - Regular Expressions

Functions

• Tutorial 15 - Functions
• Tutorial 16 - Aggregate Functions

Must Know Stuff!

• Tutorial 17 - NULL
• Tutorial 18 - Auto increment

• Tutorial 19 -Alter Drop Rename
• Tutorial 20 -Limit Keyword

Most Dreaded Topics!

• Tutorial 21 - Sub queries
• Tutorial 22 -  Unions

• Tutorial 23 - JOINS
• Tutorial 24 -  Views
• Tutorial 25 -  Index

What Next!

Tutorial 26 -  Pratical Usage of a Database

MySQL Certification Guide

Take a SQL Quiz