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Asked: 2026-05-28T16:07:25+00:00

I have a SQL Server 2008 table with a DateTime column that I’d like

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I have a SQL Server 2008 table with a DateTime column that I’d like to convert into 24h format.

The canonical guidance is to use something along the lines of:

select CONVERT(datetime, GetDate(), 121)

which yields:

2012-01-24 15:22:27.340

Perfect. Ok, so applying this knowledge, let’s replace GetDate() with a column for the CONVERT expression:

select top(5) CONVERT(datetime, LogTable.Timestamp, 121) from LogTable
order by LogTable.Id DESC

And we get:

2012-01-24 03:25:47.933
2012-01-24 03:25:46.917
2012-01-24 03:25:46.547
2012-01-24 03:25:46.543
2012-01-24 03:25:46.543

What am I doing wrong? How should the expression be crafted to get CONVERT to work on a column as opposed to the output of the GetDate() function?

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1 Answer

  1. Editorial Team

    I’ve managed to find the resolution to this issue: The service writing timestamps into the SQL table was, through bad formatting, writing “naked” datetimes into the field, effectively making them appear as “AM” irrespective of when they arrived.

    I managed to re-write the source code to write 24h datetimes into the field and it is now performing as expected. I am relieved to know my intuition was correct and it was an errant service that was the source.

    Thanks to everyone for their suggestions and guidance – very, very much appreciated!

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