ValkyrieMadness

CREATE TRIGGER exh_locs_check
BEFORE INSERT on exhibits
FOR EACH ROW
BEGIN
DECLARE @exhibit_placements int;
SET @exhibit_placements = (SELECT COUNT(*)  FROM exhibits
	JOIN collections_locations
	ON exhibits.id_коллекции = collections_locations.id_коллекции
	WHERE exhibits.id = new.id
    GROUP BY exhibits.id);
IF (@exhibit_placements) = 0 THEN
	SIGNAL SQLSTATE '12345' SET MESSAGE_TEXT='Error';
	END IF;
END

Intent nextActivityIntent = Intent(this, (имя_текущего_класса_Activity).class)
nextActivityIntent.putExtra(YOUR_INTEGER)
startActivity(nextActivityIntent)