Question

I don’t know if this is possible, but I have a column named active in a table. Whenever the active column gets changed, I would like to reset the date in the date column, but ONLY if the active column gets changed.

If other columns are changed but not the active column, then the date would remain the same.

Answer 1

something like

DELIMITER //
 CREATE TRIGGER updtrigger BEFORE UPDATE ON mytable
     FOR EACH ROW
     BEGIN
     IF NEW.active <> OLD.active THEN
     SET NEW.date = '';     
     END IF;
     END
     //