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SQL Tricks | COUNT() Tricks Every Analyst Should Know!

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SQL Tricks | COUNT() Tricks Every Analyst Should Know!

Welcome to Day 2 of the SQL Advent Calendar! Today we’re unwrapping the magic of COUNT() — one of the simplest yet most misunderstood SQL functions. In this video, you’ll learn: COUNT(1) vs COUNT(*) Why COUNT(column) behaves differently How NULLs change EVERYTHING Subscribe to Learn At Knowstar for advanced SQL tips, real interview ...

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跳转到 SQL Tutorial for Count Query 的关键时刻

起始时间 00:43How to Count Results

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