需要在SQL中对值进行分组

需要在SQL中对值进行分组,sql,oracle,window-functions,gaps-and-islands,Sql,Oracle,Window Functions,Gaps And Islands,下面是我的表数据结构 select 100 id, 1 srno,0 amt from dual union all select 100 id, 2 srno, 1000 amt from dual union all select 100 id, 3 srno, 1000 amt from dual union all select 100 id, 4 srno, 0 amt from dual union all select 1

下面是我的表数据结构

select 100 id,  1   srno,0 amt from dual
union all
select 100 id,  2   srno,       1000 amt from dual
union all
select 100 id,  3   srno,       1000 amt from dual
union all
select 100 id,  4    srno,      0 amt from dual
union all
select 100 id,  5   srno,       2000 amt from dual
我想要这样的结果

ID   From_Srno     To_Srno     amt
100   1               1         0
100   2               3         1000
100   4               4         0
100   5               5         2000

谢谢,
Fame

这是一个间隙和孤岛问题,您希望将具有相同的
amt
的“相邻”行组合在一起

我建议使用行号之间的差异来定义组:

select id, min(srno) from_srno, max(srno) max_srno, amt
from (
    select t.*, 
        row_number() over(partition by id order by srno) rn1,
        row_number() over(partition by id, amt order by srno) rn2
    from mytable t
) t
group by id, amt, rn1 - rn2

ID | FROM_SRNO | MAX_SRNO | AMT --: | --------: | -------: | ---: 100 | 1 | 1 | 0 100 | 2 | 3 | 1000 100 | 4 | 4 | 0 100 | 5 | 5 | 2000 ID |来自|最大|金额 --: | --------: | -------: | ---: 100 | 1 | 1 | 0 100 | 2 | 3 | 1000 100 | 4 | 4 | 0 100 | 5 | 5 | 2000
请解释您想要实现的逻辑。这并不明显。