SQLMentor // master SQL
// complete sql guide

Learn SQL
the right way.

From your first SELECT to recursive CTEs and window functions — structured, practical, and built for real-world use.

Start Learning Open SQL Editor
16
Topics
20+
Quiz Questions
50+
Code Examples
6
Practice Problems

Everything you need

A complete learning environment in one place

📚
Structured Content
16 topics from SQL basics to advanced window functions and recursive CTEs — all in editable Markdown files.
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Live SQL Editor
Run queries directly in the browser. No setup needed — powered by AlaSQL with sample tables ready to go.
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Quiz Yourself
20 multiple-choice questions across all difficulty levels. Instant feedback with explanations for every answer.
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Fully Responsive
Optimised for desktop, tablet, and mobile. Sidebar collapses into a slide-in drawer on smaller screens.
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Editable Content
All topic content lives in Markdown files you can edit directly. Add topics or update examples with no code changes.
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Interview Prep
11 common SQL interview questions with detailed answers, comparison tables, and annotated code examples.

All Topics

Click any topic to jump straight in

01 Introduction to SQL 02 Basic SQL 03 Filtering & Conditions 04 Aggregate Functions 05 Joins 06 Subqueries 07 Constraints 08 DDL Commands 09 DML Commands 10 Indexes 11 Views 12 Window Functions 13 CTEs & Procedures 14 Performance 15 Practice Questions 16 Interview Questions

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