我有一个DateTime维度,其日期如下:
Datetime Date hour
--------------------------------------
2026-01-01 00:00:00.0000000 24
2025-12-31 23:00:00.0000000 23
2025-12-31 22:00:00.0000000 22
2025-12-31 21:00:00.0000000 21
2025-12-31 20:00:00.0000000 20
2025-12-31 19:00:00.0000000 19
2025-12-31 18:00:00.0000000 18
2025-12-31 17:00:00.0000000 17
2025-12-31 16:00:00.0000000 16
2025-12-31 15:00:00.0000000 15
2025-12-31 14:00:00.0000000 14
2025-12-31 13:00:00.0000000 13
2025-12-31 12:00:00.0000000 12
2025-12-31 11:00:00.0000000 11
2025-12-31 10:00:00.0000000 10
2025-12-31 09:00:00.0000000 9
2025-12-31 08:00:00.0000000 8
2025-12-31 07:00:00.0000000 7
2025-12-31 06:00:00.0000000 6
2025-12-31 05:00:00.0000000 5
2025-12-31 04:00:00.0000000 4
2025-12-31 03:00:00.0000000 3
2025-12-31 02:00:00.0000000 2
2025-12-31 01:00:00.0000000 1
由于系统时间,我需要我的时间从6点开始,但是我该怎么做?我可以用硬编码的值创建一个临时表并加入,但是必须有一个更简单的方法吗?
所需结果:
Datetime Date hour
--------------------------------------
2026-01-01 00:00:00.0000000 19
2025-12-31 23:00:00.0000000 18
2025-12-31 22:00:00.0000000 17
2025-12-31 21:00:00.0000000 16
2025-12-31 20:00:00.0000000 15
2025-12-31 19:00:00.0000000 14
2025-12-31 18:00:00.0000000 13
2025-12-31 17:00:00.0000000 12
2025-12-31 16:00:00.0000000 11
2025-12-31 15:00:00.0000000 10
2025-12-31 14:00:00.0000000 9
2025-12-31 13:00:00.0000000 8
2025-12-31 12:00:00.0000000 7
2025-12-31 11:00:00.0000000 6
2025-12-31 10:00:00.0000000 5
2025-12-31 09:00:00.0000000 4
2025-12-31 08:00:00.0000000 3
2025-12-31 07:00:00.0000000 2
2025-12-31 06:00:00.0000000 1
2025-12-31 05:00:00.0000000 24
2025-12-31 04:00:00.0000000 23
2025-12-31 03:00:00.0000000 22
2025-12-31 02:00:00.0000000 21
2025-12-31 01:00:00.0000000 20
关于我为什么不持有DateDimension和 TimeDimension。因为我有很多,所以这不能满足我的要求 关于日期时间维度的更多业务规则
答案 0 :(得分:1)
鉴于您的[Date hour]
列已被计算,您可以尝试使用模数进行更新:
UPDATE yourTable
SET [Date hour] = 1 + ([Date hour] + 18) % 24;
更好的长期解决方案可能是根据原始日期时间信息将日期小时列设置为计算列。通过@Larnu找出答案,这是一种解决方法。
答案 1 :(得分:1)
一个猜测...
UPDATE YourTable
SET [Date hour] = IIF(DATEPART(HOUR,DATEADD(HOUR, -5, [datetime])) = 0,24,DATEPART(HOUR,DATEADD(HOUR, -5, [datetime]));