Q&A for Drupal developers and administrators
; with firstposts_cte AS ( SELECT u.Id AS uid, MIN(p.Id) As minid FROM Users u INNER JOIN Posts p ON p.OwnerUserId=u.Id GROUP BY u.Id ) SELECT TOP(##num?100##) uid AS [User Link], minid AS [Post Link], p.ClosedDate FROM firstposts_cte f INNER JOIN Posts p ON f.minid=p.Id ORDER BY uid ASC