SELECT MONTH(date) AS month,
count(DISTINCT case when field = 1 then ip end) as f1,
count(DISTINCT case when field = 2 then ip end) as f2
FROM table_name
WHERE field in (1,2)
GROUP BY month
SELECT MONTH(date) AS month,
count(DISTINCT case when field = 1 then ip end) as f1,
count(DISTINCT case when field = 2 then ip end) as f2
FROM table_name
WHERE field in (1,2)
GROUP BY month