Question

Push Down - you have a query which follows directly after a pivot transform. In this Query you have an aggregate function which should be pushed down - Where should you implement the Data_transfer to push down the aggregate function?

Answer 1

The data transfer to push down the aggregate function should be implemented in the pivot transform.

Step-by-step explanation:

In order to push down an aggregate function, the data transfer should be implemented in the pivot transform. The pivot transform allows you to convert rows into columns, making it possible to apply aggregates directly.

For example, let's say you have a pivot transform that converts a table of sales data with columns for product, region, and sales amounts into a pivot table with product as rows, region as columns, and sum of sales amounts as the aggregated value. You can then apply an aggregate function on this pivot table to perform further calculations or analysis.

By implementing the data transfer within the pivot transform, you can efficiently process the data in a single step, rather than moving the data to another stage and then applying the aggregate function.