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Attention Software Developers & Data Analysts:

Go From Confused to Confident: Master SQL Joins to Improve Your Career 

A step-by-step program to learn all about joins in SQL, so you’ll finally feel confident using joins in your queries.

Does This Sound Like You?

You've tried learning SQL, but when it comes to joins, it just doesn't make sense.

Maybe you've tried using INNER JOIN to get data from some tables, but don't know how it works.

Maybe you rely on a teammate to get results for you.

Or maybe you’ve tried tutorials and YouTube videos, but everything still feels confusing and disconnected.

And all that frustration adds up.

  • You waste time waiting for others for answers
  • You worry if your results are even correct
  • You feel stuck while your team members move ahead with their work

You're not alone. Joins can be understood, with the right process and plan.

That's Why I Created "Joins Mastery"

A step-by-step course that takes you from confused to confident with SQL joins.

With clear lessons and simple examples, you’ll learn to write queries with joins you can actually use at work.

Instead of spending time trying to put together random tutorials, you’ll follow a proven roadmap designed to save you time, build your confidence, and help you stand out in your team. 

By the end of this program,

you will…

 

  • Have a Solid Understanding of SQL Joins

    You'll know what joins are, why they are needed, and how to write queries that join two tables together.

  • Know All Of The Different Join Types

    You'll understand each of the different join types (such as Left, Right, Full, Cross), what they do, and when to use them.

  • How to Resolve Common Issues

    You'll know what common issues can occur when using joins and how to resolve them.

  • How to Join Many Tables

    You'll learn how you can extend your queries to join three, four, and many more tables in a single query.

Imagine This…

You sit down at your computer on Monday morning.

Instead of dreading another frustrating SQL query, you open your editor and feel a sense of calm.

You look at your data, type out a query that uses a couple of joins, and this time it works. It's efficient, clean, and it shows the right data.

You smile as the results appear on your screen. No more connecting multiple results manually. No more waiting on a teammate. The data you need is right there, ready to use.

Your manager asks for a report in the afternoon. Instead of panicking, you know exactly what to do.

You run a query, tweak a join, and within minutes, you’ve got the numbers. They’re accurate, and they make you look like the go-to problem solver.

Imagine the confidence of walking into meetings knowing you can answer questions on the spot.

Imagine how much faster your day feels when you’re not stuck second-guessing queries.

And imagine how satisfying it is to see your career moving forward because you finally have the skills employers want.

 

That’s what life looks like once SQL feels simple.

Hi, I'm Ben Brumm

I've been working with SQL and databases for over 20 years.

I first learned MySQL in 2004, moved into working with Oracle in university, then worked with these and more SQL vendors on the job.

I've been writing about databases and SQL on my website and YouTube channel for over 10 years, and am a published author: I wrote "Beginning Oracle SQL for Oracle Database 18c".

I'm passionate about helping people learn and improve their database skills.

"Ben has simplified sub-queries for me, regex, and many other topics. I feel slow when reading a lot of explanations off the internet, but his explanations are so clear, they make these topics easy to understand."

Nancy T, Database Star Academy member

"I just finished the SQL Simplified course and it was really great and helpful."

Pascal D, course student

"I just wanted to send a quick note of 'OMG, YOU SAVED MY SANITY!!!' Your explanation was the easiest to understand so I clicked on your link and BAM! here I am! Very grateful for the treasure trove of insights and tools that you have put together."

Lisa C

"I wanted to take a moment to thank you for the amazing content you share on your YouTube channel. I recently watched "Car sales Analysis SQL Project" and found it incredibly informative and helpful. Your explanations are clear, concise, and easy to follow, which I greatly appreciate."

Nader E

Enrol in Joins Mastery Today

A One-Time Payment of

$27

GET INSTANT ACCESS NOW
  • 4 high-quality video modules (23 lessons)
  • SQL Scripts to create and populate the tables

Your explanations are so clear and concise that you don’t need to go on and on and on as I have heard others do.

- Donna M

 

The brevity of lessons are more manageable and the progression is well designed.

- Merri H

 

I have learnt a lot by following your site which cannot be described in words. Examples given after each topic are very useful. The videos are simple, informative and easy to understand. 

- Korlahalli S

 

After the Database Star training, I did identify all the worst running queries on my production databases and fixed them and that reduced our cloud costs.

- David B

 

Your UX/UI is very easy to interact with and follow. The fact that you actually have videos and not just readings to go through, and sometimes interpret, is a step above many others.

Since taking your course I have completed an "End of Year Inventory Detail Report" for my manager, Dashboard creations, and daily on the spot data searches for systematically lost Inventory in our automation system.

Thank you for your teachings and I can genuinely say I look forward to the next lesson.

- Victor F

 

I run a small business and I need to setup a database to track products.

This course uses video and text and examples to help me to learn how to use a database.

I love the way he tells little secrets about SQL when teaching the course. He has answered many questions I have from other courses have taken in way that I allows me to unlock the database.

This is money well spent.

- William S

An excellent online resource for those new to SQL or wanting a refresher into a particular aspect. Well designed with modules building on past learnings that are in a concise format for those time challenged. Additionally regular blogs from Ben add value. Something here for almost all developers.

- Gary M

I wanted to take a moment to express my sincere appreciation for the incredible SQL blogs and tutorials you have provided. They have been an invaluable resource for me and have played a significant role in training the recent additions to our team.

Your clear and insightful explanations, along with the practical examples, have made complex SQL concepts more accessible to our newcomers. Your dedication to sharing your knowledge and expertise has made a real difference in our onboarding process.

I want to extend my heartfelt thanks for your contributions to the SQL community and for helping us educate and empower our team. Your work is truly making a positive impact.

Once again, thank you for your outstanding work, and we look forward to continuing to learn from your expertise in the future.

- Johnson J

I am a data analyst in the healthcare industry and I just wanted to say 'thank you' for creating such organized, easy to follow, and useful content for those of us trying to learn SQL. My personal preference is to use your pdfs to follow along the lessons and I truly cherish them; keeping them all for reference. I also appreciate that you include tips and best practices along with the content, and lots of white space in your writing.

Thank you for your passion and dedication to teaching; it makes learning so much fun and motivating.

- Greter L

The content and tutorials that you share are applicable/practical and delivered in a straightforward manner that's easy to follow (especially for those of us - like me - that generally need a little extra guidance : )

I really appreciate it!

- Berkley R

I must say that I’ve learned quite a bit from your website especially all of the articles you’ve written. They are excellent. I prefer to read articles than watching videos from time to time.

Keep up the good work. Thank you for creating your website. It does offer a lot of help to a person like me.

 

- Patrick K

Thank you so much for all that you do. I am a women far away in another continent, I have been getting your mails for years and I got interested in SQL as relates to DBA. I was able to learn and to transition from operations role in the bank to the IT department. Now, I am a Database Engineer/Administrator.

I am still your ardent follower. I am grateful.

 

- Yomi F

What you did and what you keep doing about Database Star and SQL at all is really helpful!

I find the website and all the materials really useful and helpful no matter the fact if you are here for the basics or to fill some gaps, or even to learn new things!

Thank you for all of this and I want to let you know that I'm here as a person wanting to learn the intermediate / advanced knowledge in SQL, databases and hopefully some basics / intermediate in the database administration.

 

- Daniel T

I thought I was good but YOU are the BEST and I just get a thrill whenever you release a new pearl of wisdom... I would enjoy shaking your hand but must do it virtually for now...

THANKS A BUNCH!!

 

- Daryl O

I am learning the different techniques of SQL with clear and detailed explanations given in each videos.I am learning fast from this platform. So that I could able to achieve my goal soon I guess. The quiz questions helps a lot to "verify how I understood the concepts".I could able to solve the SQL questions even in the middle of taking this course.

 

- Prema K

It’s the best training material on SQL anywhere. You have a rare gift for making the complex simple. Thank you for all you do!

 

- Brad C

I started at a new job, where I was required to learn SQL. I had not a lot of SQL experience, and I felt pretty behind the ball not knowing much. I spent a week or two on this site and it drastically improved my SQL skills. I am still no master but certainly not feeling behind anymore.

 

- Kaitlin

I highly recommend Database Star for those who want to make their future career in data analytics or related fields to learn the basic concepts and foundations. The curriculum is well organized and easy to understand.

I found Database Star while I was searching documents to improve my database and SQL skills. Ben used to send me different links and resources even before I became a member of Database Star.

 

- Abebe T

Easily the best resource I've ever found for learning SQL basics, particularly as they apply to databases from different vendors.

 

- Rob S

I really appreciate your help and support since I joined Databasestar. I really enjoyed all the good-quality, detailed training courses and documents that have heped me a lot. I found all of them very useful as well as a springboard to the Data Science field.

 

- Enrique M

I have been in the IT industry now, for over 40 years. In the late 1990's, I begin to gravitate specifically to Oracle products. In my pursuits of capturing a reliable and coherent source for specific Oracle based knowledge, I have kissed a many frogs.

I say this loud and without anyone persuading me, that Database Star is the finest, most lucid, considerate learning source that I have ever experienced. The gentleman who produces their products (Ben Brumm), actually listens to your input.

He is personable, bright, responsive and provides extremely helpful materials that deal with real world scenarios. I have several people that I peronally mentor and I always refer them to Database Star.

 

- Mike I

The thing I enjoyed the most was how you presented your thinking behind the creating of databases in general. This subject has always been a mystery to me and I always had to google things, without knowing the full picture and had to gather information from questions online. Not the best approach.

But I think your approach to thinking in simpler terms, like when we had to think in sentences and write what we were expecting out of the database, I think that part brought home a lot of "mysterious concepts" I had never seen before.. from YouTube or elsewhere.

 

- Eduardo R

Database star is a valuable resource for anyone interested in learning any of the versions of SQL. The instructions are clear and he talks at a good calm pace. The website is nice and minimal. I’m excited to learn Postgre SQL next.

 

- Kurt

I found the course informative and learned a lot, and I enjoyed doing it. I like the way you explain concepts. After taking your course, I finally understood concepts like many-to-many tables and views.

 

- Johannes P

What’s Inside Joins Mastery

 

Module 1

Basic Joins

In the first module, we'll start with the basics.

You'll learn:

  • What a join is and why they are needed in SQL.
  • How to write a simple join between two tables.
  • The two different ways of joining tables, which one to use, and why.
Module 2

More Joins

In this module, you'll expand on the simple joins from the last module.

You'll learn:

  • All of the different types of joins, such as Left, Right, and Full, and how to use them all.
  • What is a self join and why you would use it.
  • How to choose the right type of join.
Module 3

Common Pitfalls

 

In this module, you'll learn about some common issues when working with joins and how to overcome them.

You'll learn:

  • Why you might get duplicate rows and how to fix your query to avoid them.
  • How mismatched data types and white space can impact your queries and how to solve those issues.
  • Why case sensitivity matters and how it can cause problems.
Module 4

Joining Multiple Tables

In this module, you'll learn how to join three or more tables.

You'll learn:

  • How to join three, four, or more tables in a single query, and a pattern for as many tables as you need.
  • How and why to mix inner and outer joins in a query.
  • Some good practices when writing queries that use joins.
  • Myths about the poor performance of joins and how to make them perform well.

A One-Time Payment of

$27

GET INSTANT ACCESS NOW

30-Day Money Back Guarantee

I'm very confident that this course can help you improve your knowledge and SQL skills
If you join this course, and are not satisfied, let me know within 30 days of joining and I'll provide a refund for you.

Frequently Asked Questions

Enrol in Joins Mastery Today

A One-Time Payment of

$27

GET INSTANT ACCESS NOW
  • 4 high-quality video modules (23 lessons)
  • SQL Scripts to create and populate the tables

Still thinking about it?

You should give Joins Mastery a 30-day risk-free shot if you're motivated by any of the following:

  1. You know nothing about SQL and databases, but want to learn how to write SQL.
  2. You know a little bit about SQL but want to learn more.
  3. You're taking another course but are confused and unsatisfied with what you're learning.
  4. You're thinking about changing job roles into a more data-focused role and want to learn the skills to do this.
  5. Ready to take the actions needed to improve your SQL skills.

I can’t wait for you to enrol in Joins Mastery

I created this course because joins are a fundamental part of SQL, and SQL is the most important skill in the software world (in my opinion).

So much of the material out there is hard to follow, moves too quickly, and goes into more detail than you need to know.

As someone who is currently working with data, or wants to work with data, SQL is a fundamental skill to learn. It's been around for 40+ years, and is unlikely to go anywhere.

Knowing how to read and write SQL will serve you for years to come.

All it takes is a small investment in your education, and practicing the skills and techniques highlighted in the course.

You're in the right place, and this is the course for you.

There's no risk to joining, with my 30-day money-back guarantee.

I hope to see you inside.

Ben Brumm

Enrol in Joins Mastery Today

A One-Time Payment of

$27

GET INSTANT ACCESS NOW
  • 4 high-quality video modules (23 lessons)
  • SQL Scripts to create and populate the tables