所以我有以下java类
PLAYLIST
private long playlistid;
private String name;
private String playlistpersistentid;
private String librarypersistentid;
TRACK
private long trackid;
private String trackpersistentid;
private String name;
private String artist;
private String album;
private String genre;
private String librarypersistentid;
具有多对多关系,映射到此查找表:
PLAYLIST_TRACK TABLE
playlist_playlistid
tracks_trackid
我想写的查询是
"Select * from Track where Trackid in (Select Tracks_trackid from Playlist_Track where Playlist_playlistid = '#WhicheverIdWasEntered')
有人可以帮我用JPA编写查询吗?
编辑:我正在尝试根据播放列表ID返回特定播放列表中的所有曲目。
答案 0 :(得分:1)
"Select * from Track where Trackid in (Select Tracks_trackid from Playlist_Track where Playlist_playlistid = '#WhicheverIdWasEntered')"
这不是一个SQL查询的jpql查询,试试这个
"SELECT t FROM Track t where t.Trackid IN (SELECT pt.Tracks_trackid FROM Playlist_Track pt WHERE pt.Playlist_playlistid = :WhicheverIdWasEntered)"
确保在查询中使用正确的实体名称。