IF(SUM(IF(Jan IS NULL, 0, Jan))>0, SUM(IF(Jan IS NULL, 0, Jan)), NULL) This was just a guess :)
-----Original Message----- From: C.R.Vegelin [mailto:[EMAIL PROTECTED] Sent: Wednesday, December 06, 2006 11:58 AM To: mysql@lists.mysql.com Subject: SUM() of 1 and NULL is 1 ? Hi List, I need to SUM() on months from a table like: CREATE TABLE `data` ( `Jan` float default NULL, ... ) ENGINE=MyISAM; # V 5.0.15 Months may have NULL values, like: INSERT INTO data (Jan) VALUES (1), (NULL); However, when I use SELECT SUM(Jan) AS Jan, the returned value is 1 in stead of NULL. How to get a result NULL when in such a case ? TIA, Cor -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
