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Lists the most commonly used tags with empty/missing tag wikis (wiki or excerpt).

Q&A about the site for those committed to a vegan or vegetarian lifestyle and anyone interested in learning more

SELECT Count,
       ('site://questions/tagged/' + TagName + '|' + TagName)       AS TagName,
       CASE WHEN ExcerptPostId IS NOT NULL THEN 'Yes' ELSE NULL END AS Excerpt,
       CASE WHEN WikiPostId    IS NOT NULL THEN 'Yes' ELSE NULL END AS Wiki
FROM   Tags t
       LEFT JOIN Posts pe
         ON pe.Id = t.ExcerptPostId
       LEFT JOIN Posts pw
         ON pw.Id = t.WikiPostId
WHERE  ExcerptPostId IS NULL -- no excerpt post
       OR WikiPostId IS NULL -- no wiki post
       OR LEN(pe.Body) = 0   -- excerpt empty
       OR LEN(pw.Body) = 0   -- wiki empty
ORDER  BY Count DESC

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edited feb 1 13

created feb 1 13 e