SQL WHERE插入

Question

所以我有這樣的片段：

SELECT Recording_artist.artist_name,Musical_genre.musical_genre, 
COUNT(Musical_genre.musical_genre) AS Songs 
FROM Recording_artist 
FULL OUTER JOIN Album 
ON Recording_artist.recording_artist_id = Album.recording_artist_id 
RIGHT OUTER JOIN Song 
ON Album.album_id = Song.album_id 
INNER JOIN Musical_genre 
ON Album.musical_genre_id = Musical_genre.musical_genre_id 
GROUP BY Recording_artist.artist_name,Musical_genre.musical_genre; 

我需要把WHERE musical_genre = 'Rock'，但似乎預言不想要我把在任何地方......

Answer 1

如果我明白你的問題正確，這是你想要什麼？：

SELECT Recording_artist.artist_name,Musical_genre.musical_genre, 
    COUNT(Musical_genre.musical_genre) AS Songs 
FROM Recording_artist 
    FULL OUTER JOIN Album 
     ON Recording_artist.recording_artist_id = Album.recording_artist_id 
    RIGHT OUTER JOIN Song 
     ON Album.album_id = Song.album_id 
    INNER JOIN Musical_genre 
     ON Album.musical_genre_id = Musical_genre.musical_genre_id 
WHERE Musical_genre.musical_genre = 'Rock' 
GROUP BY Recording_artist.artist_name,Musical_genre.musical_genre; 

和，這個問題有mysql標記。但似乎像甲骨文的問題。