Find Products That Were Never Ordered | SQL Interview Question (LEFT JOIN vs NOT EXISTS) | Q2 скачать в хорошем качестве

Find Products That Were Never Ordered | SQL Interview Question (LEFT JOIN vs NOT EXISTS) | Q2

How to find products that were never ordered in SQL? This is one of the most common SQL interview questions — and many candidates get it wrong because they rush into writing an INNER JOIN. In this video, we clearly understand: • Why INNER JOIN gives the wrong result • How LEFT JOIN + IS NULL works • How to solve it using GROUP BY and HAVING • A cleaner solution using NOT EXISTS • What happens if NULL values exist in the Orders table This question is not about syntax. It’s about understanding matched vs unmatched rows. If you understand this properly, you can solve many “find missing records” type interview questions. 🔗 Connect with TheCodingCo: Instagram:   / thecoding.co   X (Twitter): https://x.com/thecoding_co LinkedIn:   / the-codingco   Telegram: https://t.me/thecodingco #SQL #SQLInterviewQuestions #SQLJoin #LEFTJOIN #NOTEXISTS #DatabaseInterview #LearnSQL #TheCodingCo