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Can we use aggregate function without GROUP BY?

Contents
  1. Do aggregates require a GROUP BY?
  2. Is aggregate function mandatory in GROUP BY clause?
  3. Can I use HAVING Without GROUP BY clause?
  4. Which clause Cannot be used with aggregate functions?
While all aggregate functions could be used without the GROUP BY clause, the whole point is to use the GROUP BY clause. That clause serves as the place where you'll define the condition on how to create a group. When the group is created, you'll calculate aggregated values. 28 янв. 2020 г.


Do aggregates require a GROUP BY?

If you don't specify GROUP BY , aggregate functions operate over all the records selected. In that case, it doesn't make sense to also select a specific column like EmployeeID .

Is aggregate function mandatory in GROUP BY clause?

Expressions that are not encapsulated within an aggregate function and must be included in the GROUP BY Clause at the end of the SQL statement. This is an aggregate function such as the SUM, COUNT, MIN, MAX, or AVG functions. This is the column or expression that the aggregate_function will be used on.

Can I use HAVING Without GROUP BY clause?

Having can be used without groupby clause,in aggregate function,in that case it behaves like where clause. groupby can be used without having clause with the select statement.

Which clause Cannot be used with aggregate functions?

Key Differences between WHERE and HAVING Clause 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.

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