DECLARE DATASET

     EXEC ADO
        DECLARE ds DATASET
        FOR Customers, Orders, "Order Details"
        RELATION custord Orders(CustomerID) REFERENCES Customers(CustomerID),
        RELATION orditems "Order Details"(OrderID) REFERENCES Orders(OrderID)
     END-EXEC

     EXEC ADO
        DECLARE ds UNTYPED DATASET
     END-EXEC