sql-server - SQL 每行连续日期可用

Question

如何使用 SQL 创建查询以获取每一行连续可用的房间。例如，我想找到连续 3 天至少有 3 个可用房间

原始表格

Date       Available rooms 
----       ---------------
01/12/16         4
02/12/16         5
03/12/16         5
04/12/16         5
05/12/16         4
06/12/16         0
07/12/16         3
08/12/16         4
09/12/16         4

结果如下

Date      EndDate       
--------  --------
01/12/16  03/12/16
02/12/16  04/12/16
03/12/16  05/12/16
07/12/16  09/12/16

Answer 1

尝试像下面的查询那样使用 LEAD() 函数

SELECT d as StartDate, EndDate
FROM
    (SELECT d, 
        CASE 
            WHEN available_rooms > 2 
                AND LEAD(available_rooms,1) OVER(order by d) > 2 
                AND LEAD(available_rooms,2) OVER(order by d) > 2 
            THEN LEAD(d,2) OVER(order by d) 
        END EndDate
    FROM table1 t) t1
WHERE EndDate is not null;

下面是我收到的输出