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