Chapter 5: Aggregations and Grouping
by Wayne Sheffield
Aggregate functions are used to perform a calculation on one or more values, and the result is a single value. If your query has any columns with nonwindowed aggregate functions, then a GROUP BY clause is required for the query.
KeywordsGroup Function Count Function Aggregate Function Grand Total Expression Parameter
© Jason Brimhall, Jonathan Gennick, and Wayne Sheffield 2015