This query can help with the "homework" tag cleanup. Each tag listed in this result is associated with the given number of "homework" questions.
Q&A for programmers
select count(*), at.tagname from posttags a join posttags b on (a.postid = b.postid) join tags at on (a.tagid = at.id) join tags bt on (b.tagid = bt.id) where bt.tagname = 'homework' and at.tagname <> 'homework' group by at.tagname order by 1 desc;
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