Question

我有一个名为Timezone的表，数据如下：

Call_ID        Start_Time
93856          2011-08-04 09:59:47.000
58796          2011-08-05 14:54:37.000
25489          2011-08-09 15:32:13.000

我希望输出为：

Call_ID        Start_Time                    Interval
93856          2011-08-04 09:59:47.000       0930
58796          2011-08-05 14:54:37.000       1430
25489          2011-08-09 15:32:13.000       1530

我做了类似的事情：

Select  Call_ID , Start_Time,
CASE WHEN DATEPART(minute,Start_Time)>30 THEN 
RIGHT('0' + CAST(DATEPART(HOUR,Start_Time) AS VARCHAR),2) + '30'          
ELSE 
RIGHT('0' + CAST(DATEPART(HOUR,Start_Time) AS VARCHAR),2) + '00'        
END
From Timezone
Group By Call_ID , Start_Time,
CASE WHEN DATEPART(minute,Start_Time)>30 THEN 
RIGHT('0' + CAST(DATEPART(HOUR,Start_Time) AS VARCHAR),2) + '30'          
ELSE 
RIGHT('0' + CAST(DATEPART(HOUR,Start_Time) AS VARCHAR),2) + '00'        
END

有更好的方法吗？

Answer 1

select Call_ID,
       Start_Time,
       right(100+datepart(hour, Start_Time), 2)+
       right(100+30*(datepart(minute, Start_Time)/30), 2) as Interval
from TimeZone

Answer 2

不是更短，但肯定更整洁，而且演员阵容和字符串连接更少：

;WITH intervals(h) AS
(
  SELECT TOP (48) CONVERT(TIME(0), DATEADD(MINUTE, 30*(number), '00:00'))
    FROM master..spt_values
    WHERE number >= 0
    GROUP BY number
    ORDER BY number
)
SELECT
  t.Call_ID,
  t.Start_Time,
  Interval = REPLACE(CONVERT(VARCHAR(5), i.h), ':', '')
FROM intervals AS i
INNER JOIN dbo.TimeZone AS t
ON DATEDIFF(MINUTE, i.h, CONVERT(TIME(0), t.Start_Time)) BETWEEN 1 AND 30;

如果您在边界上有一个值，则不确定您想要做什么。你想让它落在当前的间隔还是以前的间隔？如果您想要不同的行为，可以将BETWEEN 1 AND 30更改为BETWEEN 0 AND 29。

从日期时间获取时间间隔

2 个答案: