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Discussion on question by Vladimir Baranov: ROW_NUMBER() OVER (PARTITION BY B,A ORDER BY C) doesn't use index on (A,B,C)

Imported from a comment discussion on dba.stackexchange.com/questions/141999/…

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Discussion on question by Vladimir Baranov: ROW_NUMBER() OVER (PARTITION BY B,A ORDER BY C) doesn't use index on (A,B,C)