## Instruments

id | instrumentName
--- | ---
1 | Guitar
2 | Piano

## CountrySingers

id | singerName | country | foreignKey
--- | --- | --- | ---
|  |  | (→ Instruments.id)
1 | John Doe | USA | 1
2 | Jane Smith | Canada | 2

## BluegrassSingers

id | singerName | bluegrassStyle | foreignKey
--- | --- | --- | ---
|  |  | (→ Instruments.id)
1 | Tom Brown | 1 | 1
2 | Emily White | 0 | 2

## Albums

id | albumTitle | releaseYear
--- | --- | ---
1 | My First Album | 2000
2 | The Best of Me | 2010

## AlbumTracks

id | trackNumber | title | duration
--- | --- | --- | ---
1 | 1 | Track 1 | 3:00
2 | 2 | Track 2 | 3:30

## SingsOnAlbum

id | singerId | albumId
--- | --- | ---
| (→ CountrySingers.id) | (→ Albums.id)
1 | 1 | 1
2 | 2 | 1
3 | 3 | 2
4 | 4 | 2