除了my previous question之外,此表(从上一个问题扩展而来)包含重复的行
titel | interpret | jahr
-----------------------------------+------------------+-----
Beauty | Ryuichi Sakamoto | 1990
Goodbye Country (Hello Nightclub) | Groove Armada | 2001
Glee | Bran Van 3000 | 1997
Glee | Bran Van 3000 | 1997
Beauty | Ryuichi Sakamoto | 1990
Goodbye Country (Hello Nightclub)| Groove Armada | 2001
Glee | Groove Armada | 2001
我将如何选择每个重复行的一个示例? (最后一行完全由重复列组成,但不是重复行。)
I.E,结果将返回
| Beauty | Ryuichi Sakamoto | 1990
| Goodbye Country (Hello Nightclub) | Groove Armada | 2001
| Glee | Bran Van 3000 | 1997
答案 0 :(得分:1)
你会这样做:
select distinct titel, interpret, jahr from tablename
要获得编辑结果,你可以做一些有趣的事情:
select *
from table1
where rowid in
(
-- get the first row of each distinct titel
select min(sr)
from
(select distinct titel from table1) a
inner join
(
-- get first row number for each distinct titel/interpret/jahr
select min(rowid) as sr, titel, interpret, jahr
from table1
group by titel, interpret, jahr
) b
on a.titel = b.titel
group by
a.titel
);
结果如下:
titel |interpret |jahr
Beauty |Ryuichi Sakamoto|1990
Goodbye Country (Hello Nightclub)|Groove Armada |2001
Glee |Bran Van 3000 |1997