SUM Function in SQL Explained! #sql

Full Video: https://youtu.be/whAH38G48NE

Ever wonder how analysts can look at a messy table and instantly pull out answers like totals, averages, and what is really happening inside the data? In this lesson, you will learn the small set of functions that unlock that power, plus one bonus technique that catches duplicates fast.
This video is for SQL beginners, students, and aspiring data analysts who want practical MySQL skills that translate to real work. We use a healthcare dataset to make the examples feel like what you would actually run on the job.

Key takeaways you will learn:
• How to use COUNT, SUM, AVG, MIN, and MAX to summarize real datasets
• The simple rule that prevents the most common beginner aggregation mistake
• When to filter before aggregation versus after aggregation and why it matters
• How COUNT behaves differently with rows versus columns and nulls
• How MIN and MAX can quickly reveal suspicious values and data quality issues
• The bonus method that helps you measure uniqueness and spot duplicates in seconds

If you are learning SQL aggregate functions in MySQL, this tutorial will help you build the core reporting mindset used in data analytics. You will get clearer intuition for SQL COUNT, SQL SUM, SQL AVG, SQL MIN, and SQL MAX, and you will also learn when GROUP BY is required so your queries stay valid and readable. This is a foundational skill for anyone doing SQL for data analysis, building dashboards, or preparing for SQL interviews with realistic datasets.

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Видео SUM Function in SQL Explained! #sql канала Informessor