Returns the string form of this GroupByList.
The string form of this GroupByList.
The GroupByList format for an empty GroupByList is:
CopyC#
An empty GroupByList indicates a GROUP operation that will
result in a single result record.
GROUP
The format:
CopyC#
is used if the GroupByList has one or
more GroupBy objects.
GROUP BY <i>grouping-key-name1</i>, ...
The string:
CopyC#
is returned if the aggregated records are grouped by the Region
and Year combination.
GROUP BY Region, Year