Asking some basic questions about the purchaseorderdetail table.

basic_sql_explore_4.sql

select *
from purchasing.purchaseorderdetail
limit 10;

-- Are there returns?
select *
from purchasing.purchaseorderdetail
where orderqty <= 0
limit 10;

-- Why does receivedqty + rejectedqty not always equal to orderqty?
select *
from purchasing.purchaseorderdetail
where (receivedqty + rejectedqty) != orderqty
limit 10;
-- perhaps they were rejected back to the manufacturer