COUNT(*) vs COUNT(column) ❌ | SQL Interview Trap | 90% Get This Wrong | Day 9
Автор: SQLMarathibyRutuja
Загружено: 2026-01-14
Просмотров: 18
Описание:
Most SQL beginners make a big mistake with COUNT() in interviews.
In this video, you’ll clearly understand:
❌ Why COUNT(*) is NOT always correct
✅ When to use COUNT(column)
⚠️ How interviewers trap candidates using this question
This is a must-know SQL interview concept.
📌 Topics covered:
COUNT(*) vs COUNT(column)
NULL impact on COUNT
Interview questions & traps
Real SQL example
👍 Like, Share & Subscribe for daily SQL Interview prep in Marathi.
#SQL #SQLInterview #COUNT #DataAnalyst #SQLMarathi
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