When you connect Aggregator and Update Strategy transformations as part of the same pipeline, put the Aggregator before the Update Strategy transformation. In this order, the Data Integration Service performs the aggregate calculation, and then flags rows that contain the results of this calculation for insert, update, delete, or reject.

If you put the Update Strategy before the Aggregator transformation, you must consider how the Aggregator transformation handles rows flagged for different operations. In this order, the Data Integration Service flag rows for insert, update, delete, or reject before it performs the aggregate calculation. How you flag a row determines how the Aggregator transformation treats values in that row used in the calculation. For example, if you flag a row for delete and then use the row to calculate the sum, the Data Integration Service subtracts the value in this row. If you flag a row for reject and then use the row to calculate the sum, the Data Integration Service does not include the value in this row. If you flag a row for insert or update and then use the row to calculate the sum, the Data Integration Service adds the value in this row to the sum.