text: 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 (investor_id VARCHAR); CREATE TABLE INVESTORS (Investor_details VARCHAR, investor_id VARCHAR)
  ### Question:
  Show the id and details of the investor that has the largest number of transactions.
  ### Answer:
  SELECT T2.investor_id, T1.Investor_details FROM INVESTORS AS T1 JOIN TRANSACTIONS AS T2 ON T1.investor_id = T2.investor_id GROUP BY T2.investor_id ORDER BY COUNT(*) DESC LIMIT 1