DB Fiddle

SQL: Find Customers Who Have Gone Quiet with a LEFT JOIN

A beginner SQL walkthrough in the free DB Fiddle: join a customers table to orders, see why a plain JOIN hides customers who never ordered, and list every quiet account with LEFT JOIN, MAX and HAVING.

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17 steps
~15 min

Start the free practiceStart practicingDo every step yourself in a practice copyHands-on, ~15 min, best on a computer

SQL: Find Customers Who Have Gone Quiet with a LEFT JOINA beginner SQL walkthrough in the free DB Fiddle: join a customers table to orders, see why a plain JOIN hides customers who never ordered, and list every quiet account with LEFT JOIN, MAX and HAVING.This lesson needs JavaScript. You can read every step here: SQL: Find Customers Who Have Gone Quiet with a LEFT JOIN: the step-by-step guide, or browse all free AI automation tutorials.Stepthrough is free AI training by Robert Breen · Ynteractive (AI automation consulting) · Services · Hire an n8n developer