Question

我有一张桌子可以存放车辆和他们出租的日期。我想知道SQL Server 2008中的日期是否重叠以及车辆的重叠次数。我期望的结果如下。

ID  Vehicle     StartDate   EndDate     Overlap
==============================================================
1   Ford Focus  01/01/2014  31/01/2014  1
2   Ford Focus  20/01/2014  20/02/2014  1
3   Ford Focus  01/03/2014  28/03/2014  0
4   Mercedes    18/03/2014  24/03/2014  0
5   Mercedes    01/07/2014  31/07/2014  2
6   Mercedes    15/07/2014  31/07/2014  2
7   Mercedes    25/07/2014  25/08/2014  2

Answer 1

您可以尝试此查询：

select *, (select count(*) from test 
           where not (v.StartDate > EndDate or v.EndDate < StartDate) 
                 and Vehicle = v.Vehicle and ID != v.ID) as Overlap
from test v

SQL Server计数重叠次数（日期范围）

1 个答案:

Sql fiddle demo