10 Powerful Insights into the PostgreSQL HAVING Clause: Master Group Filtering in SQL

The PostgreSQL HAVING clause is a part that is used to select the required data from the initial list after the GROUP BY operation has been completed

HAVING clause is a syntax that is commonly attached to aggregate functions like COUNT(), SUM(), AVG(), MAX(), and MIN() to put restrictions on the results found

Essentially, WHERE and HAVING already constitute the differences in their filtering fields

HAVING clause is most often used with aggregate functions

The use of the HAVING clause to restrict the data after the GROUP BY operation may result in performance degradation when large datasets are involved

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