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 (transaction_type_code VARCHAR, share_count INTEGER)
### Question:
Show the maximum and minimum share count of different transaction types.
### Answer:
SELECT transaction_type_code, MAX(share_count), MIN(share_count) FROM TRANSACTIONS GROUP BY transaction_type_code