erland wrote:
> You can do it with exists directive and an inner select, something like
> this:
>
> >
Code:
--------------------
> > -- PlaylistName:Random temp
> -- PlaylistGroups:
> select tracks.url from tracks
> join genre_track on
> tracks.id=genre_track.track
> join genres on
> genre_track.genre=genres.id
> left join dynamicplaylist_history on
> tracks.id=dynamicplaylist_history.id and
dynamicplaylist_history.client='PlaylistPlayer'
> where
> audio=1
> and dynamicplaylist_history.id is null
> and genres.name in ('Jazz')
> and exists (select track from genre_track
> join genres on
> genre_track.genre=genres.id
> where
> genres.name in ('Holiday')
> and genre_track.track = tracks.id)
> group by tracks.id
> order by random()
> limit 10;
>
--------------------
> >
>
> Please note that inner selects could be slow in large libraries, in
> that case there is might also a possibility to do it through an extra
> set of joins.
Many, many thanks for this! I probably don't know enough to make use of
your suggestion yet, but I'll certainly see if my heavy-handed cut and
paste efforts can make it work. But know that it's possible should be
the inspiration I need to learn how to make it work. Something like this
was what I was thinking of when I referred to "nested queries".
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