...jaggie@DEV>INSERT INTO T5 VALUES (1,'Feb','F','D','B')
2 /
1 row created.
jaggie@DEV>SELECT SUM(cnt), MONTH
2 FROM
3 (
4 SELECT COUNT(*) cnt, MONTH FROM t5 WHERE fld2 = 'B' GROUP BY MONTH
5 UNION
6 SELECT COUNT(*) cnt, MONTH FROM t5 WHERE fld3 = 'B' GROUP BY MONTH
7...