His reign of 72 years and 110 days is the longest of any monarch of a major country in European history. In this age of absolutism in Europe, Louis XIV's France was a leader in the growing centralization of power.
If you omit the GROUP BY clause, then Oracle applies aggregate functions in the select list to all the rows in the queried table or view. You use aggregate functions in the HAVING clause to eliminate groups from the output based on the results of the aggregate functions, rather than on the values of the individual rows of the queried table or view.
If youâre a bit rusty on either subject, I encourage you to review them before continuing this article. Thatâs because we will dig further into aggregate functions by pairing them with JOINs. This duo unleashes the full possibilities of SQL aggregate functions and allows us to perform computations on multiple tables in a single query. What Do SQL Aggregate Functions Do? Hereâs a quick overview of the most common SQL aggregate functions: