I have a query which scans a subscription databse to locte the most recent expiration date of the subscription to a given periodical or service to compute the start date of a renewal.
It works fine when for a given person such a subscription exists. If none exists, as expected the query produces no results. Any suggestion on how to transform this query to produce a default value set when no past subscription exists? Here is the query: SELECT id_ltrsn, MAX(GREATEST(date_fin_ltrsn + INTERVAL 1 MONTH, CURDATE())) AS subs_start FROM ligne_trans, transaction WHERE transaction.id_trsn = ligne_trans.id_trans_ltrsn AND cd_nature_ltrsn = 2 AND ligne_trans.id_cntxt_ltrsn = 1 AND transaction.id_pers_trsn = 278 GROUP BY ligne_trans.id_cntxt_ltrsn When past subscipiton exixts it will produce as an example: id_ltrsn | subs_start --------------------- 79 | 2006-11-25 When no past subscription exists I would like to get today's date as a result instead of nothing, example: id_ltrsn | subs_start --------------------- 0 | 2005-11-09 Thanks for any help you can provide -- Jacques Brignon -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
