mickyT (9/3/2012)
You could try the following query.
select f.Path, f.FolderName, f.FolderSize, d.FileName, d.FileSize
from @Folders f
left outer join @Files d on f.Path = d.Path
group by grouping sets ((f.Path, Foldername, FolderSize), (f.path, d.FileName, d.FileSize))
order by f.Path, d.filename
This produces the same result except there are NULLs rather than empty strings
It does, but at a cost - each table is scanned twice and there are two sorts. The UNION version scans each table once followed by a single sort. Kudos for lateral thinking though ๐
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