CREATE TABLE Nothing ( God XML );
— ноль
SELECT count(*) AS X FROM
Nothing;
— один
SELECT count(*) AS X FROM
(SELECT count(*) AS X FROM Nothing) X;
— два
SELECT count(*) AS X FROM
(SELECT count(*) AS X FROM Nothing
UNION
SELECT count(*) AS X FROM (SELECT count(*) AS X FROM Nothing) X) X;
— и так далее ...
— ноль
SELECT count(*) AS X FROM
Nothing;
— один
SELECT count(*) AS X FROM
(SELECT count(*) AS X FROM Nothing) X;
— два
SELECT count(*) AS X FROM
(SELECT count(*) AS X FROM Nothing
UNION
SELECT count(*) AS X FROM (SELECT count(*) AS X FROM Nothing) X) X;
— и так далее ...