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Apache Kafka Series - KSQL on ksqlDB for Stream Processing ! (Udemy.com)

Use SQL on Apache Kafka with Confluent ksqlDB! Build an entire taxi booking application based on KSQL stream processing

4.9
2,161 reviews

Created by: Stephane Maarek

Last updated September 2026

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What you will learn

  • Learn all the fundamentals of KSQL & ksqlDB
  • Create a taxi booking application
  • Create Streams, Tables, Generate Data with ksql-datagen
  • Advanced Operations: Joins, Windowing, Aggregations, Geospatial
  • Deal with all kind of data formats: CSV, JSON & Avro
  • Create and use UDF, use UDAF
  • Moving KSQL to production with tips

How it compares

Against the other 150 rated Udemy courses in Hadoop on CourseDuck:

  • Rating4.9 out of 5higher than 99% of them
  • Reviews2,161#33 of 151 by number of reviews
  • Length4 hoursshorter than 72% of them
  • Last updatedSeptember 2026more recently than 98% of them

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Course Description

The latest release in the Apache Kafka Series!

Confluent ksqlDB has become an increasingly popular stream processing framework built upon Kafka Streams. It enables developers to write real-time stream processing applications with the ease of SQL. No Kafka Streams knowledge required!

For this course, I have partnered with KSQL expert Simon Aubury to bring you the ultimate KSQL course.

We'll take a project based approach for this course. You'll learn all the most important KSQL features by gradually building a KSQL taxi booking application!

  • KSQL Setup

  • KSQL Command Line

  • Streams with CSV, JSON, and AVRO

  • Use the KSQL-Datagen utility

  • Manipulate streams

  • Create Tables

  • Perform Joins

  • Advanced KSQL: Rekeying, Merging Streams, Windowing, Geospatial

  • Extending KSQL: UDF & UDAF

  • Moving to Production

  • KSQL Operations

Note: To best enjoy this course, a Mac or Linux machine is preferred. Windows users will have special instructions and would be better by leveraging a Linux VM.


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Instructor

My name is Stephane Maarek, and I'll be your instructor in this course. I teach about Apache Kafka, the Kafka ecosystem and Kafka Certifications with my focus always on helping my students improve their professional proficiencies. I am also the co-founder of Conduktor: an enterprise Apache Kafka platform & UI to help everyone use Kafka.

Throughout my career in designing and delivering these certifications and courses, I have already taught 1,000,000+ students and gotten 350,000+ reviews!

Simon Aubury is the lead instructor of this course. He is a KSQL expert, authored many blogs on the Confluent Blog, and wrote cool KSQL POCs on Medium such as detecting in real-time when the heater of his house is left on, or when planes go over his house! He'll be leading you through this course and make sure that everything is properly explained.

With Apache Kafka becoming much more than a buzzword out there, I've decided it's time for students to properly learn how to be a Kafka professional. So, let’s kick start the course! You are in good hands!

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This Course Also Comes With:

  • Lifetime Access to All Future Updates

  • A responsive instructor in the Q&A Section

  • Links to interesting articles, and lots of good code to base your next applications onto

  • Udemy Certificate of Completion Ready for Download

This is the course that could improve your career!

Apache Kafka is a skill in high demand and there are not enough people to fulfill all the open positions. You can boost your income, take on new roles and fun challenges. Many of my students are now the Kafka experts of their companies! You can be the next!

I hope to see you inside the course!

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Note: Looking for more advanced Kafka concepts? There are many volumes in the Apache Kafka Series:

  • Learn Kafka for Beginners v2 (great to start)

  • Kafka Connect Hands On Learning

  • Kafka Streams for Data Processing

  • KSQL on ksqlDB - Hands On!

  • Kafka Cluster Setup & Administration

  • Confluent Schema Registry & Kafka REST Proxy

  • Kafka Security (SSL SASL ACL)

  • Kafka Monitoring and Operations

Happy learning!
Read More Beginner Beginner Level product length iconTime: 4h

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Instructor Details

Stephane Maarek

Stephane is a solutions architect, consultant and software developer that has a particular interest in all things related to Cloud & Big Data. He's also a many-times best seller instructor on Udemy for his courses in AWS and Apache Kafka.


[See FAQ below to see in which order you can take my courses]

Stéphane is recognized as an AWS Hero and is an AWS Certified Solutions Architect Professional & AWS Certified DevOps Professional. He loves to teach people how to use the AWS properly, to get them ready for their AWS certifications, and most importantly for the real world.

He also loves Apache Kafka. He used on the Program Committee organizing the Kafka Summit in New York, London and San Francisco. He also was an active member of the Apache Kafka community, and has authored blogs on Medium and the guest blog for Confluent. He also has co-founded Conduktor, a prominent company in the Kafka ecosystem.


During his spare time, Stéphane composes piano music, that he publishes online under the artist name Makera ?


FAQ: In which order should you learn?...

Read More

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Reviews

4.9

2,161 ratings on Udemy

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By Karan Chaudhary on 12/14/2025

Like all the apache kafka series, hands-down the most concrete and practical explanation of the concepts. My final review will be after completing the last of the series. To all the course takers, don't rush through them. Neither am I. Take your time to learn everything about kafka

By Marco Antonio Bejar Villalba on 10/27/2022

Nice course, thank you, but I think Kafka Streams will be more useful to me, I took the course of Kafka Streams too, though. This course is really good, but I had some problems running the ksql server, I really recommend use the Docker version of Confluent, I tried to run the TAR version on an Ubuntu installation and it was a nightmare, don't know why but the server never run in that way.

By Nicholas Ng on 2/6/2022

Great course, had trouble following completely because I installed confluent 7, so had to troubleshoot some syntax issues for a few commands and took some attempts to get it correct. Nevertheless, it was a good learning experience.

By Nicholas Ngai on 12/13/2021

I thought the course was appropriate for a beginner like me just starting to learn ksql and what it has to offer. Though I did struggle a little with some of the exercises because of different results. It was also a little inconvenient to reference the read me quite a bit for updated command due to ksql documentation being updated consistently, but that is understandable. Overall a great course to get a general idea of what can be done in ksql.

By Sunil Pottumuttu on 11/14/2020

Before learning this course i don't know any thing about kafka streams i am very beginner . This course make me the things easy and gave spoon feeding information. One thing i feel missing is information on REST API . How to use rest api with ksql and some explaination on java client.. Since i am .net developer i expected . But overall this is a greate and awesome course.

By Robert Cross on 11/14/2020

Great from-first-principles-to-production course, with an obviously knowledgeable instructor.
Unfortunately fast pace of product development means some outdated parts - but additional course notes cover those.
Highly recommended for someone wanting to start KSQL.

By Eter Pani on 11/7/2020

Does not match the version 6.0

By George Ivan on 11/7/2020

Outdated instructions for starting KSQL.

By Sallo Szrajbman on 11/7/2020

There are spaces for improvements (update the versions to the newest ones, better windows support and explanations).

By Ali Ghabraei on 11/7/2020

The course is not in sync with the most recent version of conflunet.
Some concepts could be explained better.

By Richard Fryer on 10/26/2020

More problems than expected with the set-up, and a little problematic downgrading the installed Java version to 1.8/11. There are too many issues caused by the drift between older Kafka versions and the current platform, which results in errors, backtracking and reviewing the current documentation. The course desperately needs to be updated.

By Jason Bonafide on 10/13/2020

Simon Aubry and Stephane Maarek are both phenomenal instructors. Simon was the instructor for this course with a similar structure to Stepane's other courses. Simon made KSQL seem extremely easy as he is just a natural at teaching. With this course, you will learn powerful KSQL concepts that Simon makes super simple to practice and retain. For anyone looking to build upon their Apache Kafka knowledge, I highly recommend learning KSQL and using this course in doing so.

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Overall Score : 98 / 100

Apache Kafka Series - KSQL on ksqlDB for Stream Processing !
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  • Video Duration: icon 4h
  • Price: $12.99
  • Provider: icon Udemy
  • Updated: icon September 2026
  • Level: Beginner Beginner
  • Language: icon English
  • Certificate: icon Yes
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