GroupBy node

Thu, 08/18/2011 - 16:08 dmt
The GroupBy node is a very powerful node; not only because it groups the data rows that have the same values in the grouping columns, but especially because it aggregates each group of data rows into only one row by means of an aggregation method. The power of the GroupBy node lies mainly in the high number of aggregation methods available. A set of basic aggregation methods is available for String columns. This set is expanded with additional aggregation methods specific for Integer/Double cells and DateTime cells.