錯誤代碼：1066不是唯一的表/別名問題

Question

我想加入三個表：

SELECT Songs.SongId, 
Artist.ArtistFName, 
Artist.ArtistLName, 
Album.AlbumName, 
Genre.GenreName, 
Songs.SongTrackNr, 
Songs.SongName, 
Songs.SongDuration 

FROM 
(((Album 
INNER JOIN Songs ON Album.AlbumId = Songs.AlbumId) 
INNER JOIN Ablum ON Album.ArtistId = Artist.ArtistId) 
INNER JOIN Album ON Album.GenreId = Genre.GenreId); 

但我得到了不唯一的錯誤，我應該在哪裏把別名在專輯表？

感謝

Answer 1

您可以使用下面的查詢，

SELECT Songs.SongId, 
Artist.ArtistFName, 
Artist.ArtistLName, 
Album.AlbumName, 
Genre.GenreName, 
Songs.SongTrackNr, 
Songs.SongName, 
Songs.SongDuration 
FROM 
Album Album 
INNER JOIN Songs Songs 
ON (Album.AlbumId = Songs.AlbumId) 
INNER JOIN Artist Artist 
ON (Album.ArtistId = Artist.ArtistId) 
INNER JOIN Genre Genre 
ON (Album.GenreId = Genre.GenreId); 

Answer 2

你有FROM子句中Ablum和Album。我想你打算：

SELECT s.SongId, ar.ArtistFName, ar.ArtistLName, a.AlbumName, g.GenreName, 
     s.SongTrackNr, s.SongName, s.SongDuration 
FROM Album INNER JOIN 
    Songs s 
    ON a.AlbumId = s.AlbumId INNER JOIN 
    Artists ar 
    ON a.ArtistId = ar.ArtistId INNER JOIN 
    Genre g 
    ON a.GenreId = g.GenreId; 

修復是對錶名稱。另外，請注意表別名 - 它們使查詢更容易編寫和讀取。另外在FROM條款中不需要括號。