Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE TRANSACTIONS (amount_of_transaction INTEGER, transaction_type_code VARCHAR)
### Question:
Show the average amount of transactions with type code "SALE".
### Answer:
SELECT AVG(amount_of_transaction) FROM TRANSACTIONS WHERE transaction_type_code = "SALE"