Question

我无法创建包含两个或多个不同项目的日期列表。这就是我的数据

ORA-12505, TNS: listener does not currently know of SID

这可能吗？谢谢

Answer 1

您可以尝试使用CTE recursion来制作。

关键是让startTime列添加一天，然后在DateTime条件下将Date转换为CTE recursion。

CREATE TABLE T(
  ID INT,
  [Start Date Time] DATETIME,
  [End Date Time] DATETIME
);
INSERT INTO T VALUES (1,'2018-08-06 13:00:00.000','2018-08-07 10:00:00.000');
INSERT INTO T VALUES (2,'2018-08-10 08:00:00.000','2018-08-10 15:00:00.000');

查询1 ：

;WITH CTE AS (
    SELECT ID,[Start Date Time] startTime,[End Date Time] endTime
    FROM T
    UNION ALL
    SELECT ID,CAST(CAST(DATEADD(DAY,1,startTime)AS DATE) AS DATETIME),endTime 
    FROM CTE
    WHERE CAST(CAST(DATEADD(DAY,1,startTime) AS DATE) AS DATETIME) < endTime
)
SELECT id,
       startTime AS 'Start Date Time',
       (CASE WHEN LEAD(startTime,1,endTime) OVER(PARTITION BY ID ORDER BY startTime)= endTime 
                 THEN endTime
                 ELSE DATEADD(second,-1,LEAD(startTime,1,endTime) OVER(PARTITION BY ID ORDER BY startTime)) 
            END) AS 'End Date Time' 
FROM CTE

Results ：

| id |      Start Date Time |        End Date Time |
|----|----------------------|----------------------|
|  1 | 2018-08-06T13:00:00Z | 2018-08-06T23:59:59Z |
|  1 | 2018-08-07T00:00:00Z | 2018-08-07T10:00:00Z |
|  2 | 2018-08-10T08:00:00Z | 2018-08-10T15:00:00Z |

创建从两个不同的日期和项目给出的日期的递归列表

1 个答案: