Counting subcategories in an online store

Think of Amazon: they have a few of main categories, but every time you land on a product page you see these massive menus with subcategories (Books > Business > Product Management > Title). In this exercise your job will be to count all of them.

This data warehouse is inspired by an E-commerce website like Amazon.

Our E-commerce website allows vendors to sell items in multiple categories. Users can add as many items as they want to a cart and then purchase a cart with/without a discount code. Users also can return items and leave reviews.

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.