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Q&A about the site for the craft of professional writing, including fiction, non-fiction, technical, scholarly, and commercial writing

WITH 
  groups(User_id,date, grp) AS (
    SELECT DISTINCT
      OwnerUserId,
      CAST(CreationDate AS DATE),
      dateadd(day, 
        -DENSE_RANK() OVER (partition by OwnerUserId ORDER BY CAST(CreationDate AS DATE)), 
        CAST(CreationDate AS DATE)) AS grp
    FROM Posts
    WHERE OwnerUserId = ##UserId##
  )
SELECT 
  COUNT(*) AS consecutiveDates,
  MIN(date) AS minDate,
  MAX(date) AS maxDate
FROM groups
GROUP BY User_Id,grp
ORDER BY User_Id, 1 DESC, 2 DESC

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edited feb 27

created nov 7 15 anonymous