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sql - 将小时/分钟添加到日期时间

问题描述

我在如何将偏移量添加到 EventDateTime 时遇到问题。有没有办法做到这一点？我会将其转换为十进制数，但不能，因为 5:30 不是 5.3 小时，而是 5 小时 30 分钟。

数据如下所示，具有预期的输出。如果可能，请提供帮助。

样本数据：

+-----------+-----------+---------------------+-------------------------+--------+
| EventDate | EventTime |    EventDateTime    |        TimeZone         | Offset |
+-----------+-----------+---------------------+-------------------------+--------+
| 10/1/2020 | 5:00 PM   | 2020-10-01 5:00 PM  | UTC +5:30 IST New Delhi | +5:30  |
| 10/1/2020 | 8:00 PM   | 2020-10-01 8:00 PM  | UTC +5:30 IST New Delhi | +5:30  |
| 10/2/2020 | 10:00 AM  | 2020-10-02 10:00 AM | UTC -4 EDT New York     | -4     |
| 10/2/2020 | 10:00 AM  | 2020-10-02 10:00 AM | UTC -7 PDT Los Angeles  | -7     |
| 10/2/2020 | 2:00 PM   | 2020-10-02 2:00 PM  | UTC +1 BST London       | 1      |
| 10/2/2020 | 3:00 PM   | 2020-10-02 3:00 PM  | UTC -7 PDT Los Angeles  | -7     |
| 10/2/2020 | 8:00 AM   | 2020-10-02 8:00 AM  | UTC -7 PDT Los Angeles  | -7     |
| 10/5/2020 | 10:00 AM  | 2020-10-05 10:00 AM | UTC +5:30 IST New Delhi | +5:30  |
| 10/5/2020 | 10:00 AM  | 2020-10-05 10:00 AM | UTC -5 CDT Chicago      | -5     |
+-----------+-----------+---------------------+-------------------------+--------+

预期结果：

+-----------+-----------+---------------------+-------------------------+--------+---------------------+
| EventDate | EventTime |    EventDateTime    |        TimeZone         | Offset |     UTCDateTime     |
+-----------+-----------+---------------------+-------------------------+--------+---------------------+
| 10/1/2020 | 5:00 PM   | 2020-10-01 5:00 PM  | UTC +5:30 IST New Delhi | +5:30  | 2020-10-01 10:30 PM |
| 10/1/2020 | 8:00 PM   | 2020-10-01 8:00 PM  | UTC +5:30 IST New Delhi | +5:30  | 2020-10-02 1:30 AM  |
| 10/2/2020 | 10:00 AM  | 2020-10-02 10:00 AM | UTC -4 EDT New York     | -4     | 2020-10-02 6:00 AM  |
| 10/2/2020 | 10:00 AM  | 2020-10-02 10:00 AM | UTC -7 PDT Los Angeles  | -7     | 2020-10-02 3:00 AM  |
| 10/2/2020 | 2:00 PM   | 2020-10-02 2:00 PM  | UTC +1 BST London       | 1      | 2020-10-02 3:00 PM  |
| 10/2/2020 | 3:00 PM   | 2020-10-02 3:00 PM  | UTC -7 PDT Los Angeles  | -7     | 2020-10-02 8:00 AM  |
| 10/2/2020 | 8:00 AM   | 2020-10-02 8:00 AM  | UTC -7 PDT Los Angeles  | -7     | 2020-10-02 1:00 AM  |
| 10/5/2020 | 10:00 AM  | 2020-10-05 10:00 AM | UTC +5:30 IST New Delhi | +5:30  | 2020-10-05 3:30 PM  |
| 10/5/2020 | 10:00 AM  | 2020-10-05 10:00 AM | UTC -5 CDT Chicago      | -5     | 2020-10-05 5:00 AM  |
+-----------+-----------+---------------------+-------------------------+--------+---------------------+

到目前为止我做了什么：

标签： sqlsql-servertsql

解决方案

不完全漂亮，但它的工作...

DECLARE @eventDateTime VARCHAR(50), @offset varchar(10)

SET @eventDateTime = '2020-09-30 5:00AM'
SET @offset = '-5:30'

SELECT CASE WHEN @offset LIKE '-%' THEN CONVERT(DATETIME,@eventDateTime) - REPLACE(@offset,'-','')
        ELSE CONVERT(DATETIME,@eventDateTime) + REPLACE(@offset,'+','')
        END

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