Return the type of transaction with the highest total amount.
CREATE TABLE financial_transactions (
    transaction_id number,
    previous_transaction_id number,
    account_id number,
    card_id number,
    transaction_type text,
    transaction_date time,
    transaction_amount number,
    transaction_comment text,
    other_transaction_details text
)

CREATE TABLE accounts (
    account_id number,
    customer_id number,
    account_name text,
    other_account_details text
)

CREATE TABLE customers (
    customer_id number,
    customer_first_name text,
    customer_last_name text,
    customer_address text,
    customer_phone text,
    customer_email text,
    other_customer_details text
)

CREATE TABLE customers_cards (
    card_id number,
    customer_id number,
    card_type_code text,
    card_number text,
    date_valid_from time,
    date_valid_to time,
    other_card_details text
)
SELECT transaction_type FROM financial_transactions GROUP BY transaction_type ORDER BY SUM(transaction_amount) DESC LIMIT 1
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: Return the type of transaction with the highest total amount. ### Input: CREATE TABLE financial_transactions (
    transaction_id number,
    previous_transaction_id number,
    account_id number,
    card_id number,
    transaction_type text,
    transaction_date time,
    transaction_amount number,
    transaction_comment text,
    other_transaction_details text
)

CREATE TABLE accounts (
    account_id number,
    customer_id number,
    account_name text,
    other_account_details text
)

CREATE TABLE customers (
    customer_id number,
    customer_first_name text,
    customer_last_name text,
    customer_address text,
    customer_phone text,
    customer_email text,
    other_customer_details text
)

CREATE TABLE customers_cards (
    card_id number,
    customer_id number,
    card_type_code text,
    card_number text,
    date_valid_from time,
    date_valid_to time,
    other_card_details text
) ### Response: SELECT transaction_type FROM financial_transactions GROUP BY transaction_type ORDER BY SUM(transaction_amount) DESC LIMIT 1