SELECT outcome_code ,  count(*) FROM mailshot_customers GROUP BY outcome_code
Show the outcome code of mailshots along with the number of mailshots in each outcome code.
SELECT outcome_code , count ( * ) FROM mailshot_customers GROUP BY outcome_code
select outcome_code , count ( * ) from mailshot_customers group by outcome_code
Show the outcome code of mailshots along with the number of mailshots in each outcome code .