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Je Merkredo Januaro 26 2005 15:34, Ian Sales (DBA) skribis:
> SONG-TO-PERSON-OR-GROUP LINK TABLE
> * song_id
> * person_id
> * group_id
> * role (performer, lyricist, etc.)
What I don't like about that, is that half the person_id fields would be empty
and half the group_id fields would be empty. I was thinking about:
SONG-TO-PERSON-OR-GROUP LINK TABLE
* song_id
* musician_id
* type ('person', 'group')
* role (performer, lyricist, etc.)
But this is the solution that has so many redundant data. It's not very clear,
but it's there.
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