Table schema:
CREATE TABLE PURCHASES (purchase_details VARCHAR, purchase_transaction_id VARCHAR); CREATE TABLE TRANSACTIONS (transaction_id VARCHAR, amount_of_transaction INTEGER)

Question: What are the purchase details of transactions with amount bigger than 10000?
SQL: SELECT T1.purchase_details FROM PURCHASES AS T1 JOIN TRANSACTIONS AS T2 ON T1.purchase_transaction_id = T2.transaction_id WHERE T2.amount_of_transaction > 10000