Filtering Records Based on a Specific Date Range Across Time Zones: A Solution for Kuwait Standard Time.

Based on the provided code and explanation, here is a high-quality, readable, and well-documented solution:

Solution

To filter records based on a specific date range in a specific time zone, we need to design our database to have a clear understanding of its time zone reference.

Let’s assume that we want to filter records where the CreatedDate field falls within a certain date range. We’ll use the following variables:

@NowInKuwait: The current datetime in Kuwait time zone.
@Start: The start of the desired date range (5 weeks before @NowInKuwait).
@End: The end of the desired date range (6 weeks after @NowInKuwait).

Here’s the code:

DECLARE @NowInKuwait DATETIMEOFFSET = SYSDATETIMEOFFSET() AT TIME ZONE 'Arab Standard Time';
DECLARE @Start DATETIMEOFFSET = DATEADD(WK, 5, @NowInKuwait) AT TIME ZONE 'Arab Standard Time';
DECLARE @End DATETIMEOFFSET = DATEADD(WK, 6, @NowInKuwait) AT TIME ZONE 'Arab Standard Time';

SELECT *
FROM YourTable
WHERE CreatedDate >= @Start AND CreatedDate < @End;

Explanation

We start by declaring the @NowInKuwait variable, which represents the current datetime in Kuwait time zone. We then calculate the desired date range using the DATEADD and DATETIMEOFFSET functions.

The @Start variable is set to 5 weeks before the current datetime in Kuwait time zone. The @End variable is set to 6 weeks after the current datetime in Kuwait time zone.

We then select all records from YourTable where the CreatedDate field falls within the desired date range, specified by the @Start and @End variables.

Advice

When working with time zones, it’s essential to consider daylight saving time (DST) and other adjustments that may affect your calculations. Always use explicit conversions and offsets when working with datetime fields in different time zones.

Last modified on 2023-11-04