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Development Tools Database Foundations SQL Calculating, Aggregating and Other Functions Grouping, Joining and Cleaning Up

HAVING can use an alias?

The alias "average" is used in the HAVING clause. I thought you couldn't use the alias? Is HAVING an exception - can you always use an alias in a HAVING clause but you can't use an alias in COUNT etc.

What is the general rule with aliases?

1 Answer

Jose Soto
Jose Soto
23,407 Points

MySQL allows using aliases in GROUP BY, ORDER BY, and HAVING. You usually utilize HAVING with a GROUP BY clause. You would use WHERE before the GROUP BY clause and HAVING after it.