Ladislav, thanks for your help, but, currently, I can't make transformations.
Here is how I was able to list the volume discounts.
I added a "Query data source" web part and created the following query
SELECT ##COLUMNS## FROM COM_VolumeDiscount WHERE ##WHERE## ORDER BY ##ORDERBY##
Here are the web part settings:
- ORDER BY Expression: VolumeDiscountMinCount
- WHERE condition: VolumeDiscountSKUID = {%NodeSKUID%} AND VolumeDiscountCurrency = {% ECommerceContext.CurrentCurrency.ID |(identity)GlobalAdministrator%}
- Selected columns: VolumeDiscountMinCount,VolumeDiscountValue
THEN
I added a "Repeater" web part; entered the "Query data source" web part as the "Data source name"; and created a transformation to display VolumeDiscountMinCount and VolumeDiscountValue.