SQL Guide

SQL Guide — Learn SQL, One Chapter at a Time

SQL Guide is a modern, lightweight app for learning SQL fundamentals through short chapters, interactive quizzes, and a practical reference library. It is designed for beginners who want to understand core SQL concepts clearly and build confidence with real-world query patterns used across popular databases.

SQL Guide focuses on standard, widely used SQL concepts that apply to many database systems, helping you build skills that transfer easily between environments.

Whether you are new to databases or refreshing essential skills for work or interviews, SQL Guide helps you learn SQL step by step without overwhelm.

Learn by Doing

SQL Guide combines clear explanations with immediate practice, guiding you from understanding to recall and application.

Read short, focused chapters with real examples

Practice concepts with interactive quizzes

Use a built-in SQL reference for quick lookups

Bookmark important topics and revisit them anytime

Guide — SQL Basics

Follow a carefully structured curriculum that builds from fundamentals to commonly used SQL patterns. The concepts and examples are applicable across widely used relational databases, including MySQL, PostgreSQL, SQLite, Oracle, SQL Server, and MariaDB.

Queries: SELECT, DISTINCT, LIMIT

Filtering: WHERE, AND, OR, IN, BETWEEN, LIKE

Sorting and grouping: ORDER BY, GROUP BY, HAVING

Aggregation: COUNT, SUM, AVG, MIN, MAX

Joins: INNER, LEFT, RIGHT with practical join patterns

Data shaping: CASE, COALESCE, NULL handling

Advanced basics: Subqueries, CTEs, UNION

DDL and DML concepts: CREATE TABLE, INSERT, UPDATE, DELETE (concepts and common patterns)

Each chapter focuses on practical SQL usage and core ideas that are shared across database systems, without unnecessary complexity or vendor-specific details.

Quiz — Practice with Explanations

Reinforce learning with short, focused quizzes designed to test both syntax and reasoning.

Clear explanations after every question

Realistic SQL snippets and everyday query scenarios

Smooth continue flow to maintain learning momentum

Progress tracking to show what you have mastered and what comes next

Reference — Quick SQL Lookup

A concise, curated SQL reference covering frequently used SQL topics and syntax patterns commonly found in MySQL, PostgreSQL, SQLite, Oracle, SQL Server, and MariaDB environments. Ideal for fast reminders while learning or revising.

Bookmarks and Progress

Bookmark chapters and reference topics

Track course progress and quiz completion

Earn badges as you complete learning milestones

Who This Is For

Students learning SQL fundamentals

Developers refreshing core SQL skills

Analysts practicing queries and concepts

Anyone preparing for SQL interviews or assessments involving MySQL, PostgreSQL, SQLite, Oracle, SQL Server, or MariaDB

Privacy and Access

No account required

No login or external sign-in

No tracking

Everything is free. Download and get all content immediately.

Download SQL Guide and start learning SQL immediately.