15 Best FREE SQL Courses and Certifications Online in 2025 [Bestseller]

Are you looking for Best Free SQL Courses and Certifications Online?… If yes, then this article is for you. In this article, you will find the 15 Best Free SQL Courses and Certifications Online. All the courses are free and you don’t need to pay for any course.

So without any further ado, let’s get started-

Best Free SQL Courses and Certifications Online/ SQL Courses Online FREE

1. SQL for Data Analysis– Udacity

Time to Complete-	4 Weeks
Best For-	Beginners

This course is completely free and covers SQL to extract and analyze data stored in databases. SQL is used to perform data analysis in this course. First, you will learn SQL basics like how to extract data, SQL joins to join tables, and SQL aggregations.

Then you will learn how to perform complex analysis and manipulations using subqueries, temp tables, and window functions.

Pros:

• Free to take.
• Teaches both basic and advanced SQL, like subqueries and window functions.
• Great for beginners who know a bit about working with data.

Cons:

• Doesn’t cover very advanced topics beyond SQL. 
• Limited to 4 weeks, which might feel rushed.

You Should Enroll if-

• You have a general familiarity with working with data in spreadsheets.

Interested to Enroll?

If yes, then start learning- SQL for Data Analysis

2. SQL for Data Science– Coursera

Rating-	4.6/5
Time to Complete-	14 hours
Best For-	Beginners

This is a Free to Audit course on Coursera. That means you can access the course material free of cost but for the certificate, you have to pay.

In this course, you will understand the fundamentals of SQL and work with data so that you can begin analyzing it for data science purposes.

At the beginning of the course, you will learn the SQL basics and assume you do not have any knowledge or skills in SQL. After that, you will write both simple and complex queries to help you select data from tables and start to work with different types of data like strings and numbers.

This course will also teach you how to create a table and how to move data into them. At the end of this course, you will learn common operators and use case statements and concepts like data governance and profiling.

Pros:

• Free to audit; pay only if you want a certificate.
• Covers SQL fundamentals and advanced topics, including data governance.
• Ideal for complete beginners.

Cons:

• Certification requires a fee.
• It may not go deep into very advanced topics.

You Should Enroll if-

• You are a beginner and want to learn SQL for Data Science.

Interested to Enroll?

If yes, then start learning- SQL for Data Science

3. Introduction to Databases and SQL Querying– Udemy

Rating-	4.5/5
Time to Complete-	2hr 17min
Best For-	Beginner

This is a completely free SQL Course. In this course, you will learn how to query a database, how to create Tables and Databases, and how to be proficient with basic SQL querying.

After completing this course, you will be comfortable writing simple queries including queries related to Dates, String manipulation, Aggregation, etc.

Pros:

• Free to access.
• Focuses on basic SQL querying, creating tables, and databases.
• Short course duration.

Cons:

• The brief duration might not offer in-depth learning.
• Limited to basic SQL; doesn’t cover advanced queries.

You Should Enroll if-

• You are a beginner with absolutely no experience in databases. 

Interested to Enroll?

If yes, then start learning- Introduction to Databases and SQL Querying

4. Intro to Relational Databases– Udacity

Time to Complete-	4 weeks
Best For-	Intermediate learner

In this Free Course, you will learn the basics of SQL and database design, as well as the Python API for connecting Python code to a database.

You will also learn how to protect your database-backed web apps from common security problems. This course will also teach about normalized design, which makes it easier to write effective code using a database.

At the end of this course, you will learn how to use the SQL join operators to rapidly connect data from different tables.

Pros:

• Free to take.
• Covers SQL basics, database design, and using Python with databases.
• Teaches about database security and normalization.

Cons:

• Best for those with some Python knowledge.
• More suitable for intermediate learners.

You Should Enroll if-

• You can read and write basic code in Python.

Interested to Enroll?

If yes, then start learning- Intro to Relational Databases

5. Introduction to Structured Query Language (SQL)– Coursera

Rating-	4.8/5
Time to Complete-	16 hours
Best For-	Intermediate Learner

This is a Free to Audit course on Coursera. That means you can access the course material free of cost but for the certificate, you have to pay.

At the beginning of the course, you will work through the installation steps including installing a text editor, installing MAMP or XAMPP. Then you will learn single table queries and the basic syntax of the SQL language.

This course will also cover database design with multiple tables, foreign keys, and the JOIN operation. At the end of this course, you will learn how to model many-to-many relationships like those needed to represent users, roles, and courses.

Pros:

• Free to audit; pay only for certification.
• Comprehensive coverage from basic SQL to modeling complex relationships.
• Good for those with some programming experience.

Cons:

• Certification requires a fee.
• Might be too basic if you already have some SQL experience.

You Should Enroll if-

• You have some previous programming knowledge.

Interested to Enroll?

If yes, then start learning- Introduction to Structured Query Language (SQL)

6. Advanced Databases and SQL Querying– Udemy

Rating-	4.5/5
Time to Complete-	3hr 21min
Best For-	Intermediate Learner

This is an advanced TSQL Querying course. In this course, you will learn advanced concepts like Views, Triggers, Dynamic Queries, etc.

If you are a beginner, then this course is not for you. Because for this course, you must have worked with SQL servers and know how to query using management studio.

Pros:

• Focuses on advanced SQL topics like Views and Triggers.
• Suitable if you’re already familiar with basic SQL.

Cons:

• Not for beginners.
• Assumes prior experience with SQL servers.

You Should Enroll if-

• You are comfortable writing TSQL code and must know basic syntax like SELECT, INSERT, UPDATE, etc.

Interested to Enroll?

If yes, then start learning- Advanced Databases and SQL Querying

7. Databases and SQL for Data Science with Python– Coursera

Rating-	4.7/5
Time to Complete-	20 hours
Best For-	Beginner

This is a Free to Audit course on Coursera. That means you can access the course material free of cost but for the certificate, you have to pay.

This course introduces relational database concepts and helps you learn and apply foundational knowledge of the SQL language. This course is based on hands-on and practical learning. In this course, you will work with real databases, real data science tools, and real-world datasets.

This course will also teach you how to access databases from Jupyter notebooks using SQL and Python.

Pros:

• Free to audit; pay for a certificate if desired.
• Combines SQL with Python and offers practical, hands-on learning.
• Good for beginners.

Cons:

• Certification requires payment.
• May not delve deeply into advanced SQL concepts.

You Should Enroll if-

• You are a beginner with no prior knowledge of databases, SQL, Python, or programming.

Interested to Enroll?

If yes, then start learning- Databases and SQL for Data Science with Python

8. Introduction to SQL– DataCamp

Time to Complete-	2 hours
Best For-	Beginners

In this course, you will learn the basics of how data is stored and organized in relational databases, which are like digital filing cabinets.

Next, you will learn the practical side of things by delving into SQL. You’ll discover how to talk to databases, ask for specific data, and navigate through hands-on activities.

At the end, you will learn about two popular SQL flavors—PostgreSQL and SQL Server. Understand their differences, benefits, and when to use each in real-world scenarios.

Designed for curious minds, this course is for anyone aspiring to be a data whiz or looking to enhance their skills. By the end, you’ll be equipped to apply SQL to your projects and explore deeper into the world of data.

Pros:

• Covers SQL basics and introduces popular SQL flavors like PostgreSQL and SQL Server.
• Includes hands-on activities.

Cons:

• Short course; may not cover all SQL topics in depth.
• Focuses mainly on introductory material.

You Should Enroll if-

• You are a beginner and want to learn the SQL Basics.

Interested to Enroll?

If yes, then start learning- Introduction to SQL

9. SQL for Joining Data– DataCamp

Rating-	4.6/5
Time to Complete-	5 hours
Best For-	Beginner

In this course, you will learn additional SQL skills beyond the basics. Discover how to combine information from different tables and explore interesting details about countries and cities worldwide. You will gain proficiency in using tools like inner and outer joins, self joins, semi joins, anti joins, and cross joins – all essential for PostgreSQL users.

If set theory seems confusing, fear not. You will learn to use unions, intersections, and except clauses with simple diagrams and examples. Understand these concepts easily with visual aids like Venn diagrams.

Lastly, you will dive into the world of subqueries – a bit tricky, but you will learn it step by step.

Pros:

• Teaches SQL joins and set theory with visual aids.
• Ideal if you already know basic SQL and want to learn more about joins.

Cons:

• Requires basic SQL knowledge.
• Doesn’t cover more advanced SQL features beyond joins.

You Should Enroll if-

• You know SQL Basics and want to learn about SQL Joins.

Interested to Enroll?

If yes, then start learning- SQL for Joining Data

10. Intermediate SQL Queries– DataCamp

Rating-	4.6/5
Time to Complete-	4hr
Best For-	Beginner

In this course, you will learn how a data scientist transforms raw data into useful insights. Raw data, like medical records or customer transactions, is often stored in organized tables called relational databases. To be a good data scientist, you need to know how to manage and get information from these databases using a language called SQL.

You will learn the language’s syntax, which is shared by many types of databases like PostgreSQL, MySQL, SQL Server, and Oracle. This course covers everything you need to start working with databases right away.

Pros:

• Focuses on intermediate SQL queries and database management.
• Suitable for beginners wanting to advance their SQL skills.

Cons:

• Limited to intermediate queries; no coverage of very advanced topics.
• Short duration may not offer a deep dive into the subject.

You Should Enroll if-

• You are a beginner and want to learn Intermediate SQL Queries.

Interested to Enroll?

If yes, then start learning- Intermediate SQL Queries

11. Oracle SQL – A Complete Introduction– Udemy

Rating-	4.5/5
Time to Complete-	4hr 40min
Best For-	Beginner

This is a beginner-friendly course. In this course, you will learn the basics of the SQL language on an Oracle database. This course will teach how to set up your Oracle environment, how to read data using a SELECT statement, and what can be done using a SELECT statement.

Along with that, you will learn Functions, Data Types, Joins, set operators, subqueries, Inserting, updating, deleting data, and Creating tables.

Pros:

• Beginner-friendly and covers Oracle SQL basics.
• Includes practical topics like setting up Oracle and various SQL operations.

Cons:

• Focuses only on Oracle SQL.
• Limited to basic topics without advanced SQL coverage.

You Should Enroll if-

• You are a beginner and want to learn Oracle SQL.

Interested to Enroll?

If yes, then start learning- Oracle SQL – A Complete Introduction

12. Intro to SQL– Kaggle

Time to Complete-	3 hours
Best For-	Beginners

This Free SQL Course is available on Kaggle. In this course, you will basics of accessing and examining BigQuery datasets and use the keywords SELECT, FROM, and WHERE to get data from specific columns based on conditions.

After that, you will learn about three new techniques: GROUP BY, HAVING, and COUNT(). This course will also teach how to change the order of your results using the ORDER BY clause.

At the end of this course, you will learn to organize your query for better readability and combine data sources.

Pros:

• Free course covering SQL basics and BigQuery datasets.
• Good for beginners who want to learn SQL fundamentals.

Cons:

• Limited to basic SQL concepts.
• Short course might not cover advanced topics.

You Should Enroll if-

• You are a beginner and want to learn the SQL Basics.

Interested to Enroll?

If yes, then start learning- Intro to SQL

13. Advanced SQL– Kaggle

Time to Complete-	4 hours
Best For-	Intermediate Learners

This is another Free Kaggle Course to learn advanced SQL. In this course, you will learn a few more types of JOIN, along with how to use UNIONs to pull information from multiple tables.

This course will also cover how to define analytic functions, which also operate on a set of rows, and how to query nested and repeated data. 

At the end of this course, you will write queries to run faster and use less data.

Pros:

• Covers advanced SQL topics like JOINs and analytic functions.
• Ideal if you already have basic SQL knowledge.

Cons:

• Requires prior knowledge of SQL basics.
• Might not cover all advanced SQL topics thoroughly.

You Should Enroll if-

• You have prior knowledge of SQL basics.

Interested to Enroll?

If yes, then start learning- Advanced SQL

14. Oracle SQL Basics– Coursera

Rating-	4.8/5
Time to Complete-	7 hours
Best For-	Beginner

This is a Free to Audit course on Coursera. That means you can access the course material free of cost but for the certificate, you have to pay.

In this course, you will learn Table Design and how to create a simple table and look at ways to modify the existing table. Then you will learn the SQL Basics and look at the anatomy of an SQL statement, explore inserting data into a table, modify existing data, and look at the delete statement.

At the end of this course, you will learn Index designs and how are they utilized in Oracle.

Pros:

• Free to audit; pay only if you want a certificate.
• Covers Oracle SQL basics and table design.

Cons:

• Certification requires payment.
• Focuses specifically on Oracle SQL, which might not be useful for other databases.

You Should Enroll if-

• You are a beginner and want to learn Oracle SQL.

Interested to Enroll?

If yes, then start learning- Oracle SQL Basics

15. A Beginners Guide to SQL– Udemy

Rating-	4.3/5
Time to Complete-	57min

In this Free Beginner-friendly SQL course, you will learn how to communicate with relational databases through SQL. Throughout this course, you will practice how to manipulate data and build queries that communicate with more than one table.

Pros:

• Free and beginner-friendly.
• Covers basic SQL skills and data manipulation.

Cons:

• Very short course duration.
• Limited to basic SQL without advanced topics.

You Should Enroll if-

• You are a beginner and want to learn SQL Basics.

Interested to Enroll?

If yes, then start learning- A Beginners Guide to SQL

Summary of Best Free SQL Courses and SQL Certifications FREE Online

Course Name	Time to Complete	Provider	Rating	Best For
SQL for Data Analysis	4 Weeks	Udacity	NA	Beginners
SQL for Data Science	14 hours	Coursera	4.6/5	Beginners
Introduction to Databases and SQL Querying	2hr 17min	Udemy	4.5/5	Beginners
Intro to Relational Databases	4 weeks	Udacity	NA	Intermediate learner
Introduction to Structured Query Language (SQL)	16 hours	Coursera	4.8/6	Intermediate learner
Advanced Databases and SQL Querying	3hr 21min	Udemy	4.5/5	Intermediate learner
Databases and SQL for Data Science with Python	20 hours	Coursera	4.7/5	Beginners
Introduction to SQL	2 hours	DataCamp	4.7/5	Beginners
SQL for Joining Data	5 hours	DataCamp	4.6/5	Beginners
Intermediate SQL Queries	4 hours	DataCam	4.6/5	Beginners
Oracle SQL – A Complete Introduction	4hr 40min	Udemy	4.5/5	Beginners
Intro to SQL	3 hours	Kaggle	NA	Beginners
Advanced SQL	4 hours	Kaggle	NA	Intermediate Learners
Oracle SQL Basics	7 hours	Coursera	4.8/5	Beginner
A Beginners Guide to SQL	57min	Udemy	4.3/5	Beginner

My Recommendation for FREE SQL Course

• If you are a beginner, I would suggest you, enroll in SQL for Data Analysis. Because this course covers SQL basics. And the course is combined with practical exercises.
• For Intermediate learners, I would suggest Intro to Relational Databases. This course will explain some advanced concepts of SQL with a practical explanation.

That’s all!

These are the 15 Best Free SQL Courses and Certifications Online or SQL Training Courses Free. Now, it’s time to wrap up.

Conclusion

I hope these 15 Best Free SQL Courses and Certifications Online will help you to learn SQL. My aim is to provide you with the best resources for Learning. If you have any doubts or questions, feel free to ask me in the comment section.

All the Best!

Happy Learning!

FAQ

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