Issue with stored procedure execution SQL Oracle - sql

Question

I’m trying to create a stored procedure in Oracle apex that execute 4 other procedures that work by themselves alone, but it looks like I'm doing something wrong. And I don't really know what to change, could someone please help me?
create or replace procedure "UPDATE_COST"
is
begin
UPDATE orders
SET order_price = (
SELECT sum(total)
FROM detail_order
where detail_order.nord=orders.nord
group by nord
);
end;
create or replace procedure "Detail_quantity_proc"
is
begin
update detail_order d set
d.total = (select d.quantity * p.price_exclvat
from product p
where p.npro = d.npro
)
where exists (select null from product a
where a.npro = d.npro
);
end;
create or replace procedure "Proc_excl_vat"
is
begin
UPDATE bill
SET PRICE_EXCL_VAT = (
SELECT ORDER_PRICE
FROM orders
where orders.nord=bill.nord
);
end;
create or replace procedure "Proc_INCL"
is
begin
UPDATE BILL SET PRICE_INCL_VAT = PRICE_EXCL_VAT*1.06;
end;
create or replace procedure "Fill_all_cost"
is
begin
execute UPDATE_COST;
execute Detail_quantity_proc;
execute Proc_excl_vat;
execute Proc_INCL;
end;

Answer 1

You don't need the execute keyword. Also, you have those defined with double quotes, so they are case sensitive. Redefine them without the quotes:
create or replace procedure fill_all_costs
is
begin
update_cost;
detail_quantity_proc;
proc_excl_vat;
proc_incl;
end;