This query lists questions that have been closed as duplicates of another question that has since been deleted. Such questions should be either deleted or, if they have good answers or are otherwise of decent quality, reopened. Note that non-locked questions with no answers and a negative score will be automatically deleted by the RemoveDeadQuestions script after 30 days, as indicated by the "Roombable?" column.
By default, the results will be sorted with the most recently closed questions first. You can click the column headings to change the sort order. For example, questions with a high answer score may be good candidates for reopening (or for a historical lock), while questions with a high score but no answers may simply need a new dupe target (see http://meta.stackexchange.com/q/291824).
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BrokenLink.PostId as [Post Link],
SourcePost.ViewCount as Views,
SourcePost.AnswerCount as Answers,
MAX(Answer.Score) as AScore,
(CASE WHEN SourcePost.AcceptedAnswerId IS NULL THEN '' ELSE 'Accepted' END) as Accepted,
SourcePost.ClosedDate as Closed,
WHEN LockEventType.Name IS NOT NULL THEN 'No (' + LockEventType.Name + ')'
WHEN SourcePost.AnswerCount = 1 THEN 'No (1 answer)'
WHEN SourcePost.AnswerCount > 1 THEN 'No (' + Cast(SourcePost.AnswerCount as VARCHAR) + ' answers)'
WHEN SourcePost.Score = 0 THEN 'If downvoted'
WHEN SourcePost.Score > 0 THEN 'If downvoted x' + Cast(SourcePost.Score+1 as VARCHAR)
ELSE 'Yes, on ' + Convert(VARCHAR(10), DateAdd(Day, 30, SourcePost.CreationDate), 126)
END) as [Roombable?]
PostLinks as BrokenLink
JOIN Posts as SourcePost
ON SourcePost.Id = BrokenLink.PostId
LEFT JOIN Posts as TargetPost
ON TargetPost.Id = BrokenLink.RelatedPostId
LEFT JOIN Posts as Answer
ON Answer.PostTypeId = 2
AND Answer.ParentId = SourcePost.Id
LEFT JOIN PostHistory as LockEvent
ON LockEvent.PostHistoryTypeId IN (14, 18)
AND LockEvent.PostId = BrokenLink.PostId
LEFT JOIN PostHistoryTypes as LockEventType
ON LockEventType.Id = LockEvent.PostHistoryTypeId
BrokenLink.LinkTypeId = 3
AND TargetPost.Id IS NULL
AND NOT EXISTS (
SELECT 1 FROM
PostLinks as OtherLink
JOIN Posts as OtherTarget
ON OtherTarget.Id = OtherLink.RelatedPostId
OtherLink.LinkTypeId = 3
AND OtherLink.PostId = BrokenLink.PostId