# List each distinct product category alongside the total quantity sold for that category

Canonical URL: <https://datadriven.io/problems/list-each-distinct-product-category-alongside-the-total-quan-6a2a19fa>

Domain: SQL · Difficulty: medium

## Problem

List each distinct product category alongside the total quantity sold for that category. NULL categories should be grouped together into one row. Join products and transactions.

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