This appears to be some kind of equal interval problem.
SELECT v_rec1.user,
WIDTH_BUCKET(v_rec_fts.lev, 0, 100, 4) AS bucket
COUNT(*) as count, FROM v_rec2 GROUP BY user, bucket;
(Untested, but this should be the gist.)
Bucket 1 would be 0 to 25, bucket 2 is 25 to 50, 3 is 50 to 75, 4 is 75 to 100. If you really need to change the bucket number to some kind of text, you can probably nest this query inside another that uses a CASE to pick the text based on on the bucket number.
Good luck.
Then again, I guess you don't need a nested query.
SELECT v_rec1.user, CASE WIDTH_BUCKET(v_rec_fts.lev, 0, 100, 4)
WHEN 1 THEN '0 to 25'
WHEN 2 THEN '25 to 50'
WHEN 3 THEN '50 to 75'
WHEN 4 THEN '75 to 100'
ELSE 'But how?' END CASE AS quarter_percentage
COUNT(*) as count, FROM v_rec2 GROUP BY user, quarter_percentage;
