CREATE TABLE sales (sales_transaction_id NUMBER, sales_details CLOB)
CREATE TABLE investors (investor_id NUMBER, investor_details CLOB)
CREATE TABLE purchases (purchase_transaction_id NUMBER, purchase_details CLOB)
CREATE TABLE transactions (transaction_id NUMBER, investor_id NUMBER, transaction_type_code CLOB, date_of_transaction TIME, amount_of_transaction NUMBER, share_count CLOB, other_details CLOB)
CREATE TABLE ref_transaction_types (transaction_type_code CLOB, transaction_type_description CLOB)
CREATE TABLE transactions_lots (transaction_id NUMBER, lot_id NUMBER)
CREATE TABLE lots (lot_id NUMBER, investor_id NUMBER, lot_details CLOB)

What are the details of the lots which are not used in any transactions?
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
SELECT "lot_details" FROM "lots" EXCEPT SELECT "T1"."lot_details" FROM "lots" "T1" JOIN "transactions_lots" "T2" ON "T1"."lot_id" = "T2"."lot_id"