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11:44 AM
I was curious to see the question which are closed and were in the HNQ - for which it is enough to check ClosedDate IS NOT NULL: data.stackexchange.com/math/revision/1066719/1318325/…
Then I was curious to see also questions which were closed at some point (but they are not necessarily closed now). For this I used Posts p INNER JOIN PostHistory ph1 ON (p.Id=ph1.PostId and ph1.PostHistoryTypeId=52) INNER JOIN PostHistory ph2 ON (p.Id=ph2.PostId and ph2.PostHistoryTypeId=10). data.stackexchange.com/math/revision/1066724/1318324/…
Is that ok, or is doing it like this for some reason inefficient.
 

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