
alter table warehouse drop constraint pk_warehouse;
commit;

alter table district drop constraint pk_district;
commit;


alter table customer drop constraint pk_customer;
commit;
drop index ndx_customer_name;
commit;


-- history table has no primary key
-- commit;


alter table oorder drop constraint pk_oorder;
commit;
drop index ndx_oorder_carrier;
commit;


alter table new_order drop constraint pk_new_order;
commit;


alter table order_line drop constraint pk_order_line;
commit;


alter table stock drop constraint pk_stock;
commit;


alter table item drop constraint pk_item;
commit;

