CHAPTER 01
SQL · FREE TO LEARN · NO LOGIN
Learn SQL from scratch.
Practise as you go.
Explore 32 free SQL lessons, from first concepts to guided projects. Read explanations, run code, solve challenges and unlock your next step. Explanations and challenges are available in English, Hindi and Hinglish. Try each challenge and quiz, or use Check answer to understand the solution before continuing.
32 lessons · 8 chapters · Browser-based practice · Completion certificate
THE COMPLETE ROADMAP
One clear next step.
This is a structured introduction to practical SQL. Keep building projects and use the official language reference as you grow.
CHAPTER 02
Filter & sort
CHAPTER 03
Summarise with confidence
CHAPTER 04
Connect your tables
CHAPTER 05
Questions inside questions
CHAPTER 06
Analytics with windows
CHAPTER 07
Create & change data
CHAPTER 08
Design, optimise & report
WHO IT IS FOR
Built for beginners and busy professionals
- Excel users who want to answer questions from large tables without endless VLOOKUPs.
- MIS executives, analysts and coordinators who pull data from databases or reporting tools.
- Students and job seekers preparing for data analyst and business analyst interviews.
- Beginners who prefer explanations in Hindi or Hinglish.
WHAT YOU WILL LEARN
Skills you can use at work
- Read data with SELECT, aliases, calculated columns and DISTINCT.
- Filter and sort with WHERE, AND, OR, NOT, IN, BETWEEN, LIKE, ORDER BY and LIMIT, and handle NULL values.
- Summarise data with aggregate functions, GROUP BY and HAVING.
- Combine tables with INNER JOIN, LEFT JOIN, self joins and UNION.
- Write subqueries, EXISTS, CTEs, recursive CTEs and CASE expressions.
- Rank and compare rows with window functions, running totals and LAG.
- Create tables and change data safely with INSERT, UPDATE, DELETE and transactions.
- Use views, indexes, keys and normalisation, and finish a business-ready report.
HOW EACH LESSON WORKS
Read, try, check, unlock
- Understand one idea. A short explanation in English, Hindi or Hinglish, with a small example.
- Practise in your browser. Edit and run real SQL code. Nothing to install.
- Check yourself. Solve the challenge and a quick question. If you are stuck, open the worked answer and learn from it.
- Unlock the next lesson. Your progress is saved in your browser, without an account.
FINISH WITH A CERTIFICATE
Earn your Excel Keys SQL certificate
After the 32 lessons, take a 20-question final test. Score 70% or more to download a certificate with your name, completion date, final test score, a certificate ID and a QR code. Add it to LinkedIn in one click.
SQL COURSE FAQ
Questions about this course
Which SQL will I learn in this course?
You practise on SQLite inside your browser. The core skills, such as SELECT, WHERE, JOIN, GROUP BY, subqueries and window functions, work in MySQL, PostgreSQL and SQL Server too. Date functions and some advanced syntax differ between databases.
Can I learn SQL in Hindi?
Yes. Every lesson explanation and practice task is available in English, Hindi and Hinglish. SQL keywords such as SELECT and JOIN stay in English, as they do in every database.
Do I need to install a database?
No. A sample shop database with customers, products, orders, order items and employees runs in your browser. After the first visit, SQL practice can even work offline.
Is SQL useful if I already know Excel?
Yes. SQL does in one query what often takes many Excel filters, pivots and lookups, and it handles far more rows than a worksheet. Excel and SQL together make a strong base for MIS and analyst work.
How long does the SQL course take?
The lessons are planned at about 7 to 10 minutes each, roughly four and a half hours of reading and practice in total, plus the final test. You can learn at your own pace.
Will I get a certificate?
Yes. Complete all 32 lessons, pass the 20-question final test with 70% or more, and download your Excel Keys certificate as a PDF or image. It recognises self-paced completion and is not an accredited qualification.
Practise SQL with 30 exercises
Want more practice outside the lessons? Try 30 SQL practice questions with answers, from simple SELECT queries to joins, GROUP BY and window functions. Every answer shows its result table.