What is HAVING clause and how is it different from WHERE?

< 1 min read

HAVING is used to filter aggregated results after GROUP BY is applied.
WHERE filters rows before any aggregation happens.
HAVING works with aggregate functions like SUM or COUNT.
In my project, we used HAVING to find products with total sales above a threshold.
WHERE was used to filter valid transactions before grouping.
HAVING cannot be used without GROUP BY in most cases.
This separation ensures accurate aggregation and filtering.

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