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.
Table 13.25 Aggregate (GROUP BY) Functions. This section describes group (aggregate) functions that operate on sets of values. Unless otherwise stated, group functions ignore NULL values. If you use a group function in a statement containing no GROUP BY clause, it is equivalent to grouping on all rows. For more information, see Section 13.19.3, âMySQL Handling of GROUP BYâ. For numeric arguments, the variance and standard deviation functions return a DOUBLE value.