mysql Differenzmengen aus Tabellen

[Ilja]

uppss,

kleiner tippfehler:

SELECT *
FROM tblA
LEFT JOIN tblB ON tblA.index = tblB.index
LEFT JOIN tblC ON tblA.index = tblC.index
...
WHERE tblB.index IS NULL
AND tblC.index IS NULL
...

Ilja