Help with Group ID Every X rows query

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Help with Group ID Every X rows query

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ChrisM@Work SSC Guru Points: 186127 More actions · Answer 1

SELECT

DENSE_RANK() OVER(ORDER BY reference, collection_day, (rnum-1)/6 ),

*

FROM (

select

row_number() OVER (PARTITION BY reference, collection_day ORDER BY sort_date) AS rnum

,collection_day, reference, sort_date

from #temp

) d

order by reference, sort_date

^{“Write the query the simplest way. If through testing it becomes clear that the performance is inadequate, consider alternative query forms.” - Gail Shaw}

For fast, accurate and documented assistance in answering your questions, please read this article.
Understanding and using APPLY, (I) and (II) Paul White
Hidden RBAR: Triangular Joins / The "Numbers" or "Tally" Table: What it is and how it replaces a loop Jeff Moden

KubaB SSC-Addicted Points: 443 More actions · Answer 2

Perfect, thank you! Thought it might be something like that but couldn't get it right.

Cheers!