SQL - Email query range - sql

Question

I have a sql job which queries the database. The job is scheduled to run every 24 hours and it sends out an email with required data which has a query range from 07:30 today to 07:30 the previous day. Here is the code for the heading of my email :
INSERT INTO #ReportContentBuilder VALUES('<h4>Query Range : ' + DATENAME(WEEKDAY,#StartTimestamp)
+ ', ' + CONVERT(varchar, #StartTimestamp, 106) + ' ' + CONVERT(varchar, #StartTimestamp, 108)
+ ' (UTC) to ' + DATENAME(WEEKDAY,#EndTimestamp) + ', ' + CONVERT(varchar, #EndTimestamp, 106)
+ ' ' + CONVERT(varchar, #EndTimestamp, 108) + ' (UTC)</h4>')
Here is the value I have for #StartTimestamp:
SET #StartTimestamp = CAST((CONVERT(varchar(11), DATEADD(DAY, -1, #EndTimestamp), 106) + ' 07:30') as datetime)
Here is the expected output for my email heading :
Query Range : Wednesday, 19 Nov 2014 07:30:00 (UTC) to Thursday, 20 Nov 2014 07:30:00 (UTC)
My question is what value do I use for #EndTimestamp??
If I use GETUTCDATE() and the job runs 2 mins late then the range is incorrect. I also don't want to hardcode it because of the changes needed for daylight savings each time.

Answer 1

The trick is that the "dynamic" part is the difference between current time (GETUTCDATE()) and 7:30 . So with #timeDiff you can handle this dynamic part of the ecuation. Try this (replace last select with your needed insert; I only tested the output):
DECLARE #StartTimestamp datetime
DECLARE #EndTimestamp datetime = GETUTCDATE()
DECLARE #timeDiff time
SET #timeDiff = CONVERT(time, (#EndTimestamp - cast('1900-01-01 07:30:00.000' as datetime)))
SELECT #EndTimestamp = dateadd(second,
datepart(hour,#timeDiff) * -3600 +
datepart(minute,#timeDiff) * -60 +
datepart(second,#timeDiff) * -1,
#EndTimestamp)
SET #StartTimestamp = DATEADD(DAY, -1, #EndTimestamp)
SELECT #StartTimestamp, #EndTimestamp
SELECT '<h4>Query Range : ' + DATENAME(WEEKDAY,#StartTimestamp)
+ ', ' + CONVERT(varchar, #StartTimestamp, 106) + ' ' + CONVERT(varchar, #StartTimestamp, 108)
+ ' (UTC) to ' + DATENAME(WEEKDAY,#EndTimestamp) + ', ' + CONVERT(varchar, #EndTimestamp, 106)
+ ' ' + CONVERT(varchar, #EndTimestamp, 108) + ' (UTC)</h4>'