left_col,right_col,sample_type CustomerKey,First Name,P CustomerKey,Last Name,P CustomerKey,Full Name,P CustomerKey,Gender,P CustomerKey,DateFirstPurchase,P CustomerKey,Customer City,P CustomerKey,ProductKey,N CustomerKey,OrderDateKey,N CustomerKey,ShipDateKey,N CustomerKey,SalesOrderNumber,N CustomerKey,SalesAmount,N SalesOrderNumber,ProductKey,N First Name,Gender,N Full Name,OrderDateKey,N Full Name,DueDateKey,N Full Name,ShipDateKey,N Full Name,CustomerKey,N Full Name,SalesOrderNumber,N Full Name,SalesAmount,N Full Name,Gender,N Full Name,DateFirstPurchase,N Full Name,Customer City,N DateFirstPurchase,ShipDateKey,N