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--WITH q AS (
  SELECT
    DATEFROMPARTS(
      DATEPART(yyyy, CreationDate),
      DATEPART(mm, CreationDate),
      1) AS Month,
    COUNT(*) AS AllQuestions,
    COUNT(DeletionDate) AS Deleted/*
    CASE
      WHEN DeletionDate IS NOT NULL THEN 'deleted'
      WHEN DeletionDate IS NULL AND ClosedDate IS NOT NULL THEN 'closed'
      ELSE 'open'
    END AS DeletionStatus*/
  FROM PostsWithDeleted
  WHERE PostTypeId=1
  GROUP BY DATEFROMPARTS(
      DATEPART(yyyy, CreationDate),
      DATEPART(mm, CreationDate),
      1)
/*
),
p AS (
  SELECT Month, DeletionStatus, COUNT(*) AS N
  FROM  q
  GROUP BY Month, DeletionStatus
)
SELECT pDeleted.Month,
  pDeleted.N + pClosed.N + pOpen.N AS 'All',
  pDeleted.N + pClosed.N AS Closed,
  pDeleted.N AS 'Deleted'
FROM p AS pDeleted, p AS pClosed, p AS pOpen
WHERE
  pDeleted.Month = pOpen.Month 
  AND pDeleted.Month = pClosed.Month
  AND pDeleted.DeletionStatus = 'deleted'
  AND pClosed.DeletionStatus = 'closed'
  AND pOpen.DeletionStatus = 'open'
ORDER BY Month DESC*/

view current version

edited aug 30 17

created mar 27 17 peterh