Tabler Icons for Vue — Lightning-fast open source SVG icons. Perfect for your next SQLZap project.

Welcome to SQLZap

Learn SQL with us for Free.

Unlock the Power of Data With SQL Basics

As you embark on this comprehensive sql tutorial and practice sql online, you'll unlock the power of Structured Query Language (SQL). This course will provide you with the fundamental SQL skills you need to thrive in today's data-driven world. SQL is the key that unlocks the secrets hidden in your data.

Lesson 1 Introduction to SQL History of SQL, importance of SQL, Relational databases.

Lesson 2 SQL Database schema What is a DB schema and which one we will use in this course.

Lesson 3 SQL Basic syntax Case sensitivity, statements, comments...

Lesson 4 SQL Data types Common datatypes used in SQL databases

Lesson 5 SELECT statement What is 'SELECT' statement and how to use it?

Lesson 6 Constraining Queries with Conditions Leveraging Operators and Logical Keywords to Filter Result Sets

Lesson 7 Filtering and sorting SQL results Leveraging Operators and Logical Keywords to Filter Result Sets

Lesson 8 Querying multiple tables with joins Mastering Data Relationships: The Art of SQL Joins Across Multiple Tables

Lesson 9 Grouping Data and Aggregate Functions GROUP BY and HAVING clauses and aggregate functions like COUNT, SUM, AVG..

Lesson 10 Subqueries and common table expressions Subqueries, Correlated subqueries and common table expressions (CTEs)

Lesson 11 SQL functions and expressions Built-in SQL functions: string functions, date functions, and more

Lesson 12 Insert, Update and Delete INSERT, UPDATE, DELETE statements

Lesson 13 Create tables How to create a table in SQL, data types and constraints

Lesson 14 Alter tables Add/rename/drop columns and foreign keys with ALTER TABLE statement

Lesson 15 Drop tables How to drop tables from the database

Lesson 16 Indexes and performance tuning What are indexes and how to tune them

©2026 SQLZap - Learn SQL Interactively