Which clause filters rows before aggregation and affects which rows are grouped?

Problem Statement

Explanation

WHERE applies to raw rows, before grouping. It reduces input early and improves performance when selective. Use HAVING after GROUP BY when you need to filter on aggregate results, like COUNT or SUM.

Code Solution

SolutionRead Only

SELECT department_id, COUNT(*)
FROM employees
WHERE active = 1
GROUP BY department_id;

Practice Sets

This question appears in the following practice sets:

SQL Core Fundamentals

Next Question

Master Interviews
Anywhere, Anytime

Which clause filters rows before aggregation and affects which rows are grouped?

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

Which SQL statement retrieves all columns and rows from a table named employees?

What is the default sort order when ORDER BY is used without ASC or DESC?

Which construct is commonly used to paginate results in SQL engines like Postgres and MySQL?

Which predicate correctly checks for missing values in standard SQL?

What is the main purpose of using column or table aliases in a SELECT statement?

More from SQL & Databases

Master Interviews Anywhere, Anytime

Which clause filters rows before aggregation and affects which rows are grouped?

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

Which SQL statement retrieves all columns and rows from a table named employees?

What is the default sort order when ORDER BY is used without ASC or DESC?

Which construct is commonly used to paginate results in SQL engines like Postgres and MySQL?

Which predicate correctly checks for missing values in standard SQL?

What is the main purpose of using column or table aliases in a SELECT statement?

More from SQL & Databases

Master Interviews
Anywhere, Anytime