Closed questions that either have answers or haven't been downvoted. These won't go away unless you make them.
(This only checks for the 30-days rule; see http://meta.stackoverflow.com/a/92006 for the full criteria.)
Q&A for professionals, academics, and students working within the systems development life cycle
Id AS [Post Link],
CASE WHEN AnswerCount = 0 THEN NULL ELSE AnswerCount END AS Answers,
OwnerUserId AS [User Link]
WHERE ClosedDate IS NOT NULL -- closed
AND (Score >= 0 OR (AnswerCount IS NOT NULL AND AnswerCount > 0)) -- either not downvoted, or has answers