Context: CREATE TABLE TRANSACTIONS (investor_id VARCHAR, transaction_type_code VARCHAR); CREATE TABLE INVESTORS (Investor_details VARCHAR, investor_id VARCHAR)
Question: Show the ids and details of the investors who have at least two transactions with type code "SALE".
Answer: SELECT T2.investor_id, T1.Investor_details FROM INVESTORS AS T1 JOIN TRANSACTIONS AS T2 ON T1.investor_id = T2.investor_id WHERE T2.transaction_type_code = "SALE" GROUP BY T2.investor_id HAVING COUNT(*) >= 2