Detect Anomaly Intervals with SQL

Question

My problem is simple: I have a table with a series of statuses and timestamps (for the sake of curiosity, these statuses indicate alarm levels) and I would like to query this ta

Answer 1

This has to be one of the harder questions I've seen today - thanks! I assume you can use CTEs? If so, try something like this:

;WITH Filtered
AS
(
    SELECT ROW_NUMBER() OVER (ORDER BY dateField) RN, dateField, Status
    FROM Test    
)
SELECT F1.RN, F3.MinRN,
    F1.dateField StartDate,
    F2.dateField Enddate
FROM Filtered      F1, Filtered F2, (
SELECT F1a.RN, MIN(F3a.RN) as MinRN
FROM Filtered      F1a
   JOIN Filtered F2a ON F1a.RN = F2a.RN+1 AND F1a.Status = 2 AND F2a.Status <> 2
   JOIN Filtered F3a ON F1a.RN < F3a.RN AND F3a.Status <> 2
GROUP BY F1a.RN ) F3 
WHERE F1.RN = F3.RN AND F2.RN = F3.MinRN

And the Fiddle. I didn't add the intervals, but I imagine you can handle that part from here.

Good luck.