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select artist_id, track_id from ( | |
select att.track_id, att.artist_id, tag.tag_count as tag_weight, rank() over | |
(partition by att.artist_id order by (random()*(110 - rank + (play_count/3))) desc) as artist_rank from library.artisttoptrackplaycount att | |
inner join ( | |
select toptag.artist_id, sum(tag_count) as tag_count from ( | |
select artist_id, max(tag_count) as tag_count from music.artisttoptag att | |
inner join music.tag t on att.tag_id = t.id | |
where coalesce(t.corrected_id, t.id) in ( | |
select id from music.tag where tag_name in ('riot grrrl', 'punk') | |
) group by artist_id, coalesce(t.corrected_id, t.id) |