EssentialSQL: Database Normalization Simplified (Udemy.com)
Database Normalization Explained in Simple English for MySql, Oracle, SQL Server, and PostgreSQL | Database Design
Created by: Kris Wenzel
Last updated February 2024
What you will learn
- Know the reasons why a relational database is organized into many separate tables.
- Gain confidence in understanding formal database normalization rules.
- Be able to express and communication database design concepts with others.
- Be prepared to answer interview questions.
- Determine whether a database table is a good design.
- Restructure spreadsheet like data into good database form.
How it compares
Against the other 47 rated Udemy courses in PostgreSQL on CourseDuck:
- Rating4.6 out of 5higher than 85% of them
- Reviews119#25 of 48 by number of reviews
- Length1 hourshorter than 97% of them
- Last updatedFebruary 2024more recently than 51% of them
Course Description
In this Course you will Learn to:
- Appreciate and design around data modification anomalies.
- Identify a properly formed database table.
- Answer common interview questions related to normalization
- Spot a poorly designed table.
- Communicate with others about table design.
- Finally understand those confounding normalization rules!
- Being excited to learn something new but not knowing where to start.
- Wasting time learning the wrong features.
- Being overwhelmed with options and not know which to use.
- Knowledge - Knowing how to quickly understand table relationships to take your SQL to the next level.
- Confidence - Feeling good that you're on the right track.
- Accomplishment - Having a sense of accomplishment that you've learned something most cannot.
- Fun - Having fun learning databases!
By the time you've completed this course you'll have an appreciation of database normalization, overcome your fear of normal form definitions, and make sense of the the most used database normal forms. Who this course is for:
- Students baffled by their professor's database normalization explanations
- DBAs seeking common sense definitions of database normal forms.
- Anyone studying MySQL, Oracle, or SQL Server wanting to become a better database designer.
- People preparing for SQL related job interviews.
- Anyone looking to take a class whose singular purpose is to teach you database normalization
- Anyone who doesn't have time to weed through dense textbooks trying to sort out academic explanations.
Instructor Details
- 4.6 Rating
119 Reviews
Kris Wenzel
Hello my name is Kris. I'm here because I am passionate about helping non-techie people to overcome their fear of learning SQL.
Let Me Help you Get Started on the Right Foot!
I know what it is like to not know where to start or whether the time spent learning is worth the effort. That is why I am here to help you to:
Get started in an easy to follow step-by-step manner.
Use your time wisely so you focus on what is important to learn to get the most value from your time.
Answer your questions. Really! Just post a comment and I'll respond. I'm here to help.
It wasn't long ago that I was helping a colleague with some reporting. She didn't know where to start and soon got overwhelmed and lost as she didn't know SQL.
I felt really bad, as she was under pressure to get some summary information to her boss, the built-in reports were falling short, and to make them better would require her to know SQL. At that time that seemed impossible! It in dawned on me, it doesn't have to be that way.
Then I discovered a way for anyone with the desire to easily learn SQL. I worked with my co-worker, started to teach her what I learned and soon she was able to write reports and answer her boss' questions without getting stressed or ploughing hours into manipulating data in Excel.
It hasn't always been easy. Sometimes the information seems abstract or too conceptual. In this case I've found out that a visual explanation is best. I really like to use diag
More courses by Kris Wenzel
EssentialSQL: Stored Procedures Unpacked - Code in TSQL (2024)
4.4 (1,452 Reviews)
Provider: Udemy
Time: 4.9h
$11.99
EssentialSQL: Data Modeling & Relational Data Architecture (2024)
4.6 (769 Reviews)
Provider: Udemy
Time: 3.8h
$74.99
EssentialSQL: Subquery Magic - Master SQL Sub Queries. (2024)
4.6 (439 Reviews)
Provider: Udemy
Time: 2.2h
$64.99
EssentialSQL: SQL Window Functions for Business Analytics (2024)
4.5 (116 Reviews)
Provider: Udemy
Time: 3.6h
$54.99
More PostgreSQL courses
The Complete SQL Bootcamp: Go from Zero to Hero (2022)
4.7 (258,007 Reviews)
Provider: Udemy
Time: 8.9h
$159.99
SQL and PostgreSQL: The Complete Developer's Guide (2026)
4.7 (13,224 Reviews)
Provider: Udemy
Time: 22.2h
$139.99
SQL & Database Design A-Zâ„¢: Learn MS SQL Server + PostgreSQL (2025)
4.7 (5,426 Reviews)
Provider: Udemy
Time: 12.7h
$15.99
Zero to Hero in SQL: SQL for Data Analytics (2026)
4.6 (14,123 Reviews)
Provider: Udemy
Time: 10.4h
$129.99
SQL and PostgreSQL for Beginners: Become a SQL Expert (2026)
4.6 (8,732 Reviews)
Provider: Udemy
Time: 12.3h
$139.99
PostgreSQL Database Administration on Windows/Linux- Part 1 (2025)
4.6 (7,007 Reviews)
Provider: Udemy
Time: 14.3h
$74.99
Reviews
By Carl Allison
Yes
By Scott Bentley
I need application exercises!
By Oliver Weimar-Drese
Good basis for normalization, will try use it in production.
By Rishi Chowdhury
yes very good content in a nutshell
By William Fallon
Breaks are too long between sentences, slides could be a little more professional.
Other than that I'm learning what I need to, and I just increased the video speed to make it more engaging.
By Jose N
Great course overall, the explanation of third normal form leaves somewhat to be desired though, transitive is explained with an example and not a concise, simplified, definition, more examples would be useful for this last case also.
By MUSAH Abdulmumini. Y
It has the fundamental basic ingredient to make you understand using very simple and live examples.
It is engaging and commendable , excellent instructor,
By s ah
Good course, probably best viewed a few times. A link to some more practice scenarios would be a nice to have.
By Jacob Zachry
Everything you need to know about normalization in 1 hr. Perfect course for just anyone just getting started in database design.
By Di Salau
Learning SQL database development and this is critical to good design
By Wayne Shackel
Outstanding course, it really helped me to finally understand "normalization". Thank you, I really appreciate it.
By John Dunn
"Database Normalization Simplified" was an excellent course. It is top of the class. The instructor clearly stated that Normalization is hard to understand. However, through learning and practice, it can be intuitive. At the conclusion the course, I felt confident that I could create and design simple databases up to Third Normal Form. Of course, I would need additional learning and practice using other aspects of data modeling and design.
Now that I have dispelled my fears that I am capable of designing and creating relational databases, I am eager to continue my journey. Therefore, I am hoping that Mr. Wenzel will create more courses in other areas, such as Relationships with an emphasis on at least employing two junction tables. The concept of Many to Many is not explored adequately by many providers. Combining "Database Normalization Simplified" with a full course on relationships would be an ideal complement to the other database design and modeling courses on Udemy. This course would be helpful, not only for emerging database designers but also for Excel data modeling.
In short, thank you, Mr. Wenzel, for helping me in moving forward with the confidence and insights that I can create tables where "all nonkey columns are dependent on the key, the whole key, and nothing but the key, so help me Codd!"
Quality Score
Overall Score : 92 / 100










