SQL interview question: find the customers who never ordered.
INNER JOIN drops them. LEFT JOIN keeps them with NULL, so filter on NULL.
15 free SQL interview questions: link in the reply 👇
👩💻 Olivia Wilson
Coding @ Pavleur.com
Blonde brains & tech dreams 💡
Making the digital world a cooler place, one line at a time. 🚀✨

