SELECT n
FROM
(
SELECT (a.digit + (10 * b.digit) + (100 * c.digit) + (1000 * d.digit) + (10000 * e.digit) + (100000 * f.digit) + (1000000 * g.digit) + (10000000 * h.digit)) as n
    from (select 0 as digit union all select 1 union all select 2 union all select 3 union all select 4 union all select 5 union all select 6 union all select 7 union all select 8 union all select 9) as a
    cross join (select 0 as digit union all select 1 union all select 2 union all select 3 union all select 4 union all select 5 union all select 6 union all select 7 union all select 8 union all select 9) as b
    cross join (select 0 as digit union all select 1 union all select 2 union all select 3 union all select 4 union all select 5 union all select 6 union all select 7 union all select 8 union all select 9) as c
    cross join (select 0 as digit union all select 1 union all select 2 union all select 3 union all select 4 union all select 5 union all select 6 union all select 7 union all select 8 union all select 9) as d
    cross join (select 0 as digit union all select 1 union all select 2 union all select 3 union all select 4 union all select 5 union all select 6 union all select 7 union all select 8 union all select 9) as e
    cross join (select 0 as digit union all select 1 union all select 2 union all select 3 union all select 4 union all select 5 union all select 6 union all select 7 union all select 8 union all select 9) as f
    cross join (select 0 as digit union all select 1 union all select 2 union all select 3 union all select 4 union all select 5 union all select 6 union all select 7 union all select 8 union all select 9) as g
    cross join (select 0 as digit union all select 1 union all select 2 union all select 3 union all select 4 union all select 5 union all select 6 union all select 7 union all select 8 union all select 9) as h
) as a
LEFT JOIN
( SELECT DISTINCT wbit_item_id from wbt_item_terms where wbit_item_id BETWEEN 0 AND 87061632 ) as b
ON wbit_item_id = n
WHERE wbit_item_id IS NULL
AND n BETWEEN 0 AND 87061632
;