set new.id_tezaver = (select IFNULL(id_tezaver,0) from tezaver t where term = new.term and l2='la' )
--> column id_tezaver can not be null
Yeah, I know it returns null, but should be sorted by ifnull ?
EDIT: I see it now, it actualy returns nothing, not null.
How to write trigger for that ?
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Last edited by BubikolRamios; 02-28-2013 at 08:49 AM..