drop table  test94_poly_car
/
drop table  test94_poly_computer
/
drop table  test94_poly_laptop
/
drop table  test94_poly_ordr
/
drop table  test94_poly_owner
/
drop table  test94_poly_prod
/
drop table  test94_poly_order_product
/
drop table  test94_poly_detail
/
drop table  test94_poly_truck
/
