A Day Without A Smile Is A Lost Day?

Screw that: A Day without learning something is a lost Day!

UPDATE TabelleA
SET
TabelleA.Column1 = TabelleB.Column1,
TabelleA.Column2 = TabelleB.Column2,
TabelleA.ColumnN = TabelleB.ColumnN
FROM TabelleA
JOIN TabelleB
ON TabelleA.ID = TabelleB.ID
WHERE [...]

Verwunderlich das mir so ein Problem bisher noch nicht untergekommen ist.