查找跨越多列的数字范围中的间隙

Question

我正在尝试识别一系列数字（SQL Server）中的差距。我的场景如下。。。

ID   Start   End
1      1      4
2      1      6
3      2      4
4      8     10
5     13     14
Visual
-------------------------------
1-2-3-4
1-2-3-4-5-6
  2-3-4
           - -8-9-10
                    - - -13-14

这样做的结果可能是：

Table
-------------------------------
ID   Start   End   Gap
4      8     10    -1
5     13     14    -2

最终，我想知道差距的范围，但我应该能够从上面弄清楚。。。

Missing
7
11-12

我提出的解决方案要么太慢，要么没有考虑到范围重叠（例如ID 2）

CREATE TABLE #Docs (
  [Rank] INT, --DENSE_RANK () OVER(ORDER BY BegProd)
  ControlNumber BIGINT,
  BegProd INT,
  EndProd  INT
)
SELECT
  T1.ControlNumber,
  T1.BegProd,
  T1.EndProd,
  MAX(T2.EndProd) AS [PreviousEndProd],
  [Gap] = T1.BegProd - MAX(T2.EndProd) - 1
FROM #Docs T1
INNER JOIN #Docs T2
  ON T1.[Rank] = T2.[Rank] + 1
  AND T1.EndProd > T2.EndProd
GROUP BY T1.ControlNumber, T1.BegProd, T1.EndProd
HAVING T1.BegProd - MAX(T2.EndProd) > 1

该表中有200多万行，的范围从10亿到10亿

编辑修复了"丢失"表。间隙列指示在该起始数字之前有多少间隙。（不包括缺失的#7是1个数字）

Answer 1

试试这个：

create table #docs(id int, start int, [end] int)
insert #docs values(1,1,4),(2,1,6),(3,2,4),(4,8,10),(5,13,14)
;with a as
(
select start, dense_rank() over (order by start) rn
from #docs t where not exists (select 1 from #docs where t.start > start and t.start < [end])
group by start
), b as
(
select [end], dense_rank() over (order by [end]) rn
from #docs t where not exists (select 1 from #docs where t.[end] > start and t.[end] < [end])
group by [end]
)
select 
case when a.[start]= b.[end]+2 then cast(a.start-1 as varchar(21)) 
else cast(b.[end]+1 as varchar(10)) +'-' +  cast(a.start - 1 as varchar(10)) end missing
from a join b on a.rn - 1 = b.rn
and a.[start] <> b.[end] + 1

结果：

Missing
7
11-12