Zero-to-Expert Tutorial

SQL and Databases Complete Learning Path

SQL and relational databases provide structured ways to model, store, query, protect, and operate application data.

Starts from zero
84 lessons
14 modules
6 projects

Start Tutorial

Begin From ZeroNo prior subject knowledge is assumed.

Ordered ModulesFollow the curriculum in order without skipping prerequisites.

Complete ProjectsPlan, build, integrate, test, and refine real outcomes.

Direct Lesson AccessEvery curriculum item links directly to its lesson.

About this tutorial

Learn SQL and Databases from the beginning

SQL and relational databases provide structured ways to model, store, query, protect, and operate application data.

This continuous 84-lesson curriculum starts from zero, introduces every required tool and concept in order, and progresses through First Query, Workflow, Database Foundations, Core SQL Queries, Joins Aggregation and Subqueries, Advanced SQL before capstone work.

Who this tutorial is for

Beginners, application developers, analysts, and database practitioners who need dependable relational design and query skills.

Prerequisites

No previous SQL and Databases experience is required. The opening curriculum begins with “What a Database Is and Why Applications Need One” and introduces setup, accounts, software, terminology, and prerequisite checkpoints before advanced work.

Master curriculum

Complete SQL and Databases Tutorial

Follow all 84 lessons in exact curriculum order. Open any lesson directly from the curriculum below and follow the modules in order.

Module 1

Start Here

2 lessons · Start from Zero

Lesson 1

What a Database Is and Why Applications Need One

Start from Zero · Sequential Tutorial Lesson

Start from ZeroLesson Lesson 2

Understand Relational Databases Tables Rows and Columns

Start from Zero · Sequential Tutorial Lesson

Start from ZeroLesson

Module 2

Setup

3 lessons · Start from Zero

Lesson 3

Module 3

First Query

4 lessons · Beginner

Lesson 6

Module 4

Workflow

3 lessons · Beginner

Lesson 10

Module 5

Database Foundations

5 lessons · Beginner

Lesson 13

Module 6

Core SQL Queries

6 lessons · Beginner

Lesson 18

Module 7

Joins Aggregation and Subqueries

6 lessons · Intermediate

Lesson 24

Module 8

Advanced SQL

6 lessons · Intermediate

Lesson 30

Module 9

Transactions and Concurrency

6 lessons · Intermediate

Lesson 36

Module 10

Indexes and Query Performance

6 lessons · Advanced

Lesson 42

Module 11

Database Programming and Operations

6 lessons · Advanced

Lesson 48

Module 12

PostgreSQL MySQL and SQL Server Practice

6 lessons · Professional

Lesson 54

Module 13

Projects and Capstones

24 lessons · Capstone

Project 1 · plan

Module 14

Finish and Continue

1 lessons · Completion

Lesson 84

Complete the SQL and Databases Tutorial and Choose What to Learn Next

Completion · Tutorial Completion

CompletionLesson

Ready to begin?

Start at lesson 1 and follow the curriculum in sequence.

Start Tutorial

SQL and Databases Complete Learning Path

Learn SQL and Databases from the beginning

Who this tutorial is for

Prerequisites

What a Database Is and Why Applications Need One

Understand Relational Databases Tables Rows and Columns

Choose SQLite PostgreSQL or MySQL for Learning SQL

Install a Beginner-Friendly Database and SQL Client

Create Your First Local Database

Create Your First Table from Scratch

Insert Your First Rows

Run Your First SELECT Query

Update and Delete Practice Data Safely

Save SQL Scripts and Re-run Them Reproducibly

Understand SQL Errors Constraints and Data-Type Errors

Learn How to Read Database Documentation and Query Plans

Design Tables Rows Columns and Keys

Choose Data Types and Constraints

Understand Primary Foreign and Candidate Keys

Model One-to-One One-to-Many and Many-to-Many Relationships

Normalize Data to First Second and Third Normal Form

Use SELECT FROM and WHERE

Sort and Limit Query Results

Use DISTINCT and NULL Correctly

Use String Numeric and Date Functions

Write CASE Expressions

Use Aliases and Calculated Columns

Use INNER LEFT RIGHT and FULL Joins

Aggregate Data with GROUP BY

Filter Aggregates with HAVING

Write Scalar and Correlated Subqueries

Use Common Table Expressions

Use Set Operations UNION INTERSECT and EXCEPT

Use Window Functions

Use Ranking and Analytic Functions

Write Recursive CTEs

Pivot and Unpivot Data

Work with JSON Data in SQL Databases

Use Views and Materialized Views

Understand ACID Transactions

Use COMMIT ROLLBACK and Savepoints

Understand Isolation Levels

Identify Locks Blocking and Deadlocks

Use Optimistic and Pessimistic Concurrency

Design Idempotent Database Operations

Understand B-Tree and Hash Index Concepts

Design Composite and Covering Indexes

Read Query Execution Plans

Identify Table Scans and Expensive Operators

Avoid Common SQL Performance Anti-Patterns

Measure and Tune Slow Queries Systematically

Use Stored Procedures and Functions

Understand Triggers and Their Tradeoffs

Design Database Migrations Safely

Back Up and Restore Relational Databases

Manage Roles Privileges and Least Access

Monitor Database Health and Capacity

Set Up PostgreSQL for Development

Use PostgreSQL-Specific Features Effectively

Set Up MySQL for Development

Use MySQL-Specific Features Effectively

Set Up SQL Server for Development

Choose the Right Relational Database for a Project

Project: Understand Requirements and Plan Normalized ecommerce schema

Project: Build the Foundation of Normalized ecommerce schema

Project: Complete and Integrate Normalized ecommerce schema

Project: Test Debug Refine and Finish Normalized ecommerce schema

Project: Understand Requirements and Plan Sales reporting query pack

Project: Build the Foundation of Sales reporting query pack

Project: Complete and Integrate Sales reporting query pack

Project: Test Debug Refine and Finish Sales reporting query pack

Project: Understand Requirements and Plan Analytics query library with windows

Project: Build the Foundation of Analytics query library with windows

Project: Complete and Integrate Analytics query library with windows

Project: Test Debug Refine and Finish Analytics query library with windows

Project: Understand Requirements and Plan Transaction-safe order workflow

Project: Build the Foundation of Transaction-safe order workflow

Project: Complete and Integrate Transaction-safe order workflow

Project: Test Debug Refine and Finish Transaction-safe order workflow

Project: Understand Requirements and Plan Index tuning case study