This screenshot displays a CT mapping containing two rectangles, each representing an execution unit. The rectangle on the left contains the following Table operators, from top to bottom: ORDERS and ORDER_DETAILS. The rectangle on the right contains the following operators, from left to right: JOINER, AGGREGATOR, and ORDERS_AGG_CUST. Arrows connect ORDERS and ORDER_DETAILS to JOINER. An arrow connects JOINER to AGGREGATOR, which in turn, is connected to ORDERS_AGG_CUST.