Aggregations Element (List)
Contains field references for totals columns or calculated columns — in other words, for fields to which a function is applied.
Optional Text. Set On to specify that total rows are enabled for the datasheet view; otherwise, do not specify this attribute.
The following example uses the Aggregations element to contain references for a totals column and a calculated column in a datasheet view. The first reference specifies that the Count function is applied to the Title column; the second reference specifies that the Sum function is applied to the Number column.