What are the details of the lots which are not used in any transactions?
create table lots (lot_details varchar, lot_id varchar, PRIMARY KEY (lot_details)); create table lots (lot_details varchar, PRIMARY KEY (lot_details)); create table transactions_lots (lot_id varchar, PRIMARY KEY (lot_id))
select lot_details from lots except select t1.lot_details from lots as t1 join transactions_lots as t2 on t1.lot_id = t2.lot_id