How to count, sum, and average rows in SQL: Databases for Developers #6
Want to count how many rows your query returns?
Or the number of orders per customer?
Or find your fastest time to run races of 1k, 5k and 10k?
You can answer all these questions in SQL using group by and aggregate functions. Watch this video to find out how!
For a complete list of aggregate functions available in Oracle Database 12.2 g to: http://docs.oracle.com/database/122/S...
Take the Databases for Developers FREE SQL course at https://devgym.oracle.com/pls/apex/dg...
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Twitter: / chrisrsaxon
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All Things SQL blog: https://blogs.oracle.com/sql/
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The Magic of SQL with Chris Saxon
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