Question

如何在列中找到最大不间断间隔？

实施例

ID    Result
1       1
2       2
3       3
4       4
5       5
6       6
10
11
12

Answer 1

您可以使用row_number()。以下是获取first和lsat值的简单方法：

select top (1) with ties min(id), max(id)
from (select t.*, row_number() over (order by id) as seqnum
      from t
     ) t
group by (id - seqnum)
order by count(*) desc;

要获取实际的原始行，需要另一级窗口函数：

select top (1) with ties
from (select t.*, count(*) over (partition by id - seqnum) as cnt
      from (select t.*, row_number() over (order by id) as seqnum
            from t
           ) t
     ) t
order by cnt desc, id;

找到最大不间断间隔

1 个答案: