This graphic shows the valid mapping design with Staging table.

At the top of the graphic are the following operators, ordered from left to right: TAB1, MM, STAGE_MM, JOIN, and TAB2. Below these operators is the CUSTOMERS operator. There are arrows connecting TAB1 to MM, MM to STAGE_MM, STAGE_MM to JOIN, and JOIN to TAB2. There is also an arrow connecting CUSTOMERS to JOIN.