Having Clause in SQL
In SQL, the HAVING clause is used to filter the results of a GROUP BY operation, enabling more granular control over which records are returned based on aggregate functions. While it shares similarities with the WHERE clause, it serves a distinct purpose within the context of grouped data.
Purpose of the HAVING Clause:
Filtering Grouped Data: The HAVING clause filters records after the GROUP BY clause has aggregated the data. It allows you to specify conditions on aggregated data that cannot be applied using the WHERE clause.
Working with Aggregates: It’s specifically designed to work with aggregate functions such as SUM(), COUNT(), AVG(), MIN(), and MAX(). The WHERE clause cannot be used to filter on these aggregates directly.
