SQLite:如何 select 全部,并为某些列另外设置一个值

SQLite : How to select all, and additionally set a value for some column

我有以下查询。

@Query("SELECT * FROM sounds GROUP BY artistId ORDER BY artist")
        List<Sound> getArtists();

我想 select 全部,然后将 isDirectory 设置为 return 对于在此查询中 returned 的所有行为真?

我试过了:

@Query("SELECT *, " +
                "artist AS title," +
                "isDirectory AS 'true' " +
                "FROM sounds GROUP BY artistId ORDER BY artist").

我知道这是用于列别名,有没有办法使用类似于 AS 的东西,但不是用于名称,而是用于值。

尝试'true' AS isDirectory而不是相反