Sqlite选择列并删除重复

Question

我有sqlite数据库和歌曲表，现在我想从此表中获取艺术家列表，我想删除重复匹配，所以如果我有一个艺术家2或3次，例如我将得到它只有一次，任何方式做到这一点？

我在使用no：

SELECT artist FROM Songs ORDER BY name

Answer 1

您可以使用distinct关键字：

select distinct artist from songs order by artist;

或者，如果您想要比艺术家名称多一点（例如，每位艺术家的参赛作品数量），您可以使用group by条款：

select artist, count(*) as entries from songs group by artist order by artist;

Answer 2

SELECT DISTINCT artist FROM Songs ORDER BY name

Answer 3

DELETE FROM Songs WHERE id NOT IN
(SELECT MAX(id) FROM table GROUP BY id);