query: SELECT investor_id ,  avg(amount_of_transaction) FROM TRANSACTIONS GROUP BY investor_id
question: Are Showing the average amount of transactions for different investors.
query_toks: SELECT investor_id , avg ( amount_of_transaction ) FROM TRANSACTIONS GROUP BY investor_id
query_toks_no_value: select investor_id , avg ( amount_of_transaction ) from transactions group by investor_id
question_toks: Are Showing the average amount of transactions for different investors.