The Ultimate SQL Tutorial

By Haroon Ahamed KitthuLast updated on May 12, 2025474898

Tutorial Highlights

Structured query language or SQL is used to operate databases that help in database creation, deletion, fetching, modification, and so much more. SQL is the standard language for Relational Database Systems. All the Relational Database Management Systems (RDMS), like MySQL, MS Access, Oracle, Sybase, Informix, etc., use SQL as their standard database language.

SQL comes with a dozen of advantages. It allows you to create and drop databases and tables, set permissions on tables, procedures and views, and more. With this SQL tutorial, learn all about the language and concepts and prepare for an SQL interview with interview questions and answers. Start the SQL tutorial now.

Skills Covered

SQL with Python
ER Diagrams in DBMS
PostgreSQL
Triggers in SQL
IF Statement
IF THEN Statement in SQL

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Topics Covered

Our SQL tutorial offers a comprehensive guide to key concepts in database management and programming. You'll dive into Entity-Relationship (ER) Diagrams in DBMS, where we cover how to model data relationships visually, a crucial step in database design.

Additionally, we explore PostgreSQL, helping you master this powerful, open-source relational database system with practical examples and exercises. Our tutorial also walks you through the use of Triggers in SQL, teaching you how to automate tasks and ensure data integrity by executing predefined actions when certain events occur in the database.

We also cover the IF and IF THEN statements in SQL, showing you how to implement conditional logic for more dynamic and flexible queries.

By the end of our tutorial, you'll have a solid grasp of these essential SQL topics and be equipped to apply them effectively in real-world scenarios.

About the Author

Haroon Ahamed Kitthu

Haroon is the Senior Associate Director of Products at Simplilearn. bringing 10 years of expertise in product management and software development. He excels in building customer-focused, scalable products for startups and enterprises. His specialties include CRM, UI/UX and product strategy.