aggregate functions in sql with where condition

Thus, the WHERE clause may not contain aggregate functions; it makes no sense to try to use an aggregate to determine which rows will be inputs to the aggregates.
On the other hand, HAVING clauses always contain aggregate functions.

Can we use aggregate functions in both WHERE and HAVING clauses to filter data?

We cannot use the WHERE clause with aggregate functions because it works for filtering individual rows.
In contrast, HAVING can works with aggregate functions because it is used to filter groups.

Can we use group function in WHERE clause?

Group functions cannot be used in WHERE clause.
The can appear in SELECT, HAVING and ORDER BY clause.

Can an aggregate function may appear in the WHERE class?

Note: Although aggregate functions cannot appear directly in a WHERE clause, they can appear in the SELECT or HAVING clause of a subquery that appears in a WHERE clause.
Copyright 2020 Actian Corporation.

Can aggregate functions be used in the WHERE clause? No, aggregate functions cannot be used in a WHERE clause. They are allowed in the SELECT list and in the HAVING clause.

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