Group Function:
"Group Functions" also known as "Multiple-Row Functions". They operates on set of rows to give one result per group. These set may be the whole table or the table split into groups.
Group Functions: • SUM • AVG • COUNT • MIN • MAX • STDDEV • VARIANCE
(These are similar to the "aggregate functions" or "Group By" functions in Access)
GROUP BY clause
To identify groups of records to be processed
HAVING clause
To restrict the groups displayed
The data types for arguments may be CHAR, VARCHAR2, NUMBER, or DATE.
The Oracle Server implicitly sorts the result set in ascending order when using a GROUP BY clause. To override the default ordering, DESC can be used in an ORDER by clause. Some simple