如何在SQL Server 2012中編寫遞歸CTE小時和分鐘

Question

我想生成一個半小時的時間間隔列表。任何建議都會非常有幫助。我試過這個，並沒有工作。謝謝

WITH cte 
AS (select convert(varchar, DATEADD(Day, 0, DATEDIFF(Day, 0, GetDate())), 108) AS Today 

    UNION ALL 

    SELECT dateadd(MINUTE, 30, Today) AS Today 
    FROM cte 
    WHERE dateadd(MINUTE, 30,Today) < (select convert(varchar, DATEADD(Day, 1, DATEDIFF(Day, 0, GetDate())), 108)) 
    ) 
SELECT* 
FROM cte 

要獲取：

0:00 
0:30 
1:00 
1:30 
2:00 
2:30 
3:00 
3:30 
4:00 
4:30 
5:00 
5:30 
6:00 
6:30 
7:00 
7:30 
8:00 
8:30 
9:00 
9:30 
10:00 
10:30 
11:00 
11:30 
12:00 
12:30 
13:00 
13:30 
14:00 
14:30 
15:00 
15:30 
16:00 
16:30 
17:00 
17:30 
18:00 
18:30 
19:00 
19:30 
20:00 
20:30 
21:00 
21:30 
22:00 
22:30 
23:00 
23:30 
0:00 

Answer 1

不能將時間轉換爲VARCHAR，然後用它DATETIME功能，你需要保持它作爲一個DATETIME整個遞歸部分：

;WITH cte AS (SELECT DATEADD(day, 0, DATEDIFF(day, 0, GETDATE())) dt 
       UNION ALL 
       SELECT DATEADD(MINUTE, 30, dt) AS dt 
       FROM cte 
       WHERE dt < DATEADD(day,1,GETDATE()) 
      ) 
SELECT CONVERT(VARCHAR(12),dt, 108) 
FROM cte