Show the description of transaction type with code 'PUR'.
CREATE TABLE Ref_Transaction_Types (
    transaction_type_description VARCHAR,
    transaction_type_code VARCHAR
)
SELECT transaction_type_description FROM Ref_Transaction_Types WHERE transaction_type_code = "PUR"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: Show the description of transaction type with code 'PUR'. ### Input: CREATE TABLE Ref_Transaction_Types (
    transaction_type_description VARCHAR,
    transaction_type_code VARCHAR
) ### Response: SELECT transaction_type_description FROM Ref_Transaction_Types WHERE transaction_type_code = "PUR"