創建表上的Android sqlite異常

Question

我想在onCreate（）方法中創建一個表，但sqlite拋出異常，語法錯了。但如果我在Firefox SQLite管理器中嘗試相同的查詢，它創建表成功。不知道是什麼毛病我code.The查詢如下：

CREATE TABLE playlistSongs(
id INTEGER PRIMARY KEY, 
playlist_id INTEGER, 
FOREIGN KEY(playlist_id) REFERENCES playlists(id) ON DELETE CASCADE, 
song_id INTEGER, 
FOREIGN KEY(song_id) REFERENCES songs(id) ON DELETE CASCADE); 

的例外是：

11-22 16:44:58.066: E/AndroidRuntime(11241): Caused by: 
android.database.sqlite.SQLiteException: near "song_id": syntax error: 
CREATE TABLE playlistSongs(id INTEGER PRIMARY KEY,playlist_id 
INTEGER,FOREIGN KEY(playlist_id) REFERENCES playlists(id) ON DELETE 
CASCADE,song_id INTEGER,FOREIGN KEY(song_id) REFERENCES songs(id) ON 
DELETE CASCADE); 

Answer 1

問題是外國KEY declaration.I曾在類似這樣的結尾聲明它們：

CREATE TABLE playlistSongs（ID INTEGER PRIMARY KEY，PLAYLIST_ID INTEGER，song_id INTEGER，外鍵（PLAYLIST_ID）參考文獻 播放列表（ID）ON DELETE CASCADE，外鍵（song_id）參考文獻 歌曲（ID）ON DELETE級聯）;

感謝@ njzk2