Learn SQL: GROUP by clause and COUNT function
Our previous videos in this series covered many basic SQL statements, such as SELECT, INSERT, UPDATE, and more. If you've already watched these videos and want to take things a step further, we encourage you to dive deeper into SQL scripting and learn about aggregate functions.
The best way to start this journey is with the GROUP BY clause, which groups rows that have the same values into summary rows and is widely used when working with aggregate functions. Today we will talk about why it is needed, explain how it works, and look at some simple examples of its use.
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