Homepage – Monthly Cohort - The BI School by Nick Holt

Learn SQL in six weeks

with live weekly coaching

Master the SQL skills used by analysts and developers every day through live, small-group coaching.

No pre-recorded videos. Just 4–8 people, learning practical PostgreSQL for an hour each week using a proven method that actually moves you forward.

Why this exists

There are plenty of SQL courses.

Most leave you watching videos alone, copying examples, and hoping it clicks when you finally open a real database at work.

That isn’t what we’re doing here.

The B.I. School 6-week live training group is designed for people who want a structured path, live feedback, and enough confidence to start solving genuine business problems with SQL.

You’ll write queries every session, ask questions as you go, and leave with skills you can use at work the next day.

Who is this for?

You're trying to break into data

You've seen SQL on every analyst job description and want a practical way to learn it properly.

You've outgrown Excel or Power BI

You know SQL is a next level skill that will greatly enhance your competence and flexibility when it comes to creating reports.

You've been handed a SQL project

Your employer expects results but learning the tech skills is your own responsibility. You need to get productive quickly.

You're tired of being blocked

Instead of logging tickets and waiting days for someone else to write or edit the SQL queries, you want to do it yourself.

Your 6-week Roadmap

Week One

Intro to relational data, SELECTs and JOINs

Getting started with SQL
Overview of relational databases
Extract data from a single table
Basic filtering
Join two tables with two most common join types

Week Two

Filtering, query structure and good practices

Aliasing tables and columns
Structuring queries for style and readability
Advanced filtering with wildcards and complex commands

Week Three

Working with date and time logic

Core Postgres date and time functions
Building dynamic timeframes by combining and manipulating functions
Examples: Year to date, previous month and others that you’ll use daily in business

Week Four

String functions, numerics & data types

Manipulating text with built-in functions
Working with numbers using basic and advanced operators
Type casting and data transformations

Week Five

Conditional logic, combining datasets and aggregation

The CASE expression
UNION / UNION ALL for combining results
Grouping and summarising data
Filtering aggregated data with HAVING

Week Six

Advanced structuring and modular code

Database views and reusability
Subqueries and derived tables
Using CTEs for organising complex queries

If you're preparing for an upcoming job interview or technical assessment, its unlikely that you'll be asked anything that isn't covered in this 6-week course.

Your Instructor

Nick Holt - twenty years of using SQL

...and teaching for over ten years

I run The B.I. School, where I specialize in teaching SQL.

My live coaching programs skip the theoretical fluff and focus entirely on practical, everyday skills – giving you the direct confidence to tackle complex data and answer critical business questions fast.

Ready to sign up and start learning?

Applications are open for the September 3rd cohort. Spots are capped strictly at 8 students to guarantee the best quality coaching.

There’s no ‘buy now’ button. All applications are personally and individually vetted and , if successful, you’ll be sent a payment link.

* 100% money-back guarantee if you’re not satisfied after Week 1.

* The session will only run if there are enough confirmed attendees (minimum 4)

* If not enough people have confirmed attendance, then you will be invited to join the group beginning the first week of the following month

Here's what our previous customers are saying about our training

Most of the reviews below are from our ‘SQL in a day’ live training course that we ran in 2025.

If you join our 6-week training, you’ll be asked to contribute a review and/or interact with us on LinkedIn either as a standalone post, or by commenting and resharing our posts about the training. This is the main reason we’re able to keep the prices so low.

“Our best marketing materials are the people who’ve seen just how good we are, and are willing to talk about it.” – Nick Holt