yo,
SELECT a.isin
FROM tabelle AS a
WHERE a.Option_id = Wert1 AND a.platform_id = Wert2
AND a.isin NOT IN
(SELECT b.isin FROM tabelle AS b WHERE b.platform_id <> Wert2)
Ilja
yo,
SELECT a.isin
FROM tabelle AS a
WHERE a.Option_id = Wert1 AND a.platform_id = Wert2
AND a.isin NOT IN
(SELECT b.isin FROM tabelle AS b WHERE b.platform_id <> Wert2)
Ilja