Jak dodać numer kolejny dla każdego elementu w grupie za pomocą zapytania SQL bez tabel tymczasowych

Może coś takiego:

SELECT
    ROW_NUMBER() OVER(PARTITION BY [Group] ORDER BY Record) AS GroupSequence1,
    RANK() OVER(PARTITION BY [Group] ORDER BY Record) AS GroupSequence2,
    DENSE_RANK() OVER(PARTITION BY [Group] ORDER BY Record) AS GroupSequence3,
    Table1.Group,
    Table1.Record
FROM
    Table1

GroupSequence1 , GroupSequence2 i GroupSequence3 zapewni Ci pożądany efekt.