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

What are the purchase details of transactions with amount bigger than 10000?
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
SELECT "T1"."purchase_details" FROM "purchases" "T1" JOIN "transactions" "T2" ON "T1"."purchase_transaction_id" = "T2"."transaction_id" AND "T2"."amount_of_transaction" > 10000