DECLARE
    p_id NUMBER(10);
BEGIN
    FOR i IN 1..apex_application.g_f01.count LOOP
            SELECT id
            INTO p_id
            FROM mark
            WHERE id = apex_application.g_f01(i);
            
            CASE p_id
            WHERE IS NULL THEN   
                INSERT INTO mark (id, mark)
                VALUES (apex_application.g_f01(i), 1); 
        
        END CASE;
    END LOOP;
END;

BEGIN
    FOR i IN 1..apex_application.g_f01.count LOOP
        MERGE INTO mark m 
            USING 
        (SELECT id 
        FROM data_table
        WHERE id = apex_application.g_f01(i)) dt
            ON (m.id = dt.id)
        WHEN MATCHED THEN
            UPDATE SET m.mark = 1
        WHEN NOT MATCHED THEN
            INSERT (id, mark)
        VALUES (apex_application.g_f01(i), 1);
    END LOOP;
END;