The biggest B2B customer

It’s a typical financial research for B2B products: which customer is the biggest (aka “brings the most revenue”)? In the beginning of any B2B startup those customers are precious – losing one might mean the end of a startup.

This data warehouse simply contains all company’s financial transactions.

If the company paid for something – there’s a debit transaction with negative amount. If someone paid the company – it’s a credit transaction with positive amount.

Hi, it’s Anatoli, the author of SQL Habit.

SQL Habit is a course (or, as some of the students say, “business simulator”). It’s based on a story of a fictional startup called Bindle. You’ll play a role of their Data Analyst and solve real-life challenges from Business, Marketing, and Product Management.

SQL Habit is also a collection of Practice exercises (you’re looking at one atm) based on various datasets (E-commerce, Finance, etc). They’re meant to deepen your SQL and Data Analysis knowledge , prepare you for any challenge at work or a job interview.