yo,
SELECT ....
FROM tabelle_bilder AS b
LEFT JOIN tabelle_bildertexte AS bt ON (b.picnr = bt.bildnr)
LEFT JOIN tabelle_sprachen AS s ON (bt.sprache = s.langnr AND s.kuerzel='DE')
WHERE b.osname='Kuh.jpg'
oder kurzform
SELECT ....
FROM tabelle_bilder AS b
LEFT JOIN tabelle_bildertexte AS bt ON (b.picnr = bt.bildnr AND bt.sprache='1')
WHERE b.osname='Kuh.jpg'
beides sollte in jedem fall mindestens einen datensatz liefern.
Ilja