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Editorial Team
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Asked: 2026-05-25T19:35:28+00:00

I have a simple details table like so: listid custid status last_changed The primary

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I have a simple details table like so:

listid
custid
status
last_changed

The primary key consists of both listid and custid.

Now I’m trying to setup a trigger that sets the last_changed column to the current datetime every time an insert or update happens. I’ve found lots of info on how to do that with a single PK column, but with multiple PKs it gets confusing on how to correctly specify the PKs from the INSERTED table.

The trigger has to work in SQL Server 2005/2008/R2.

Thanks for a working trigger code!

Bonus would be to also check if the data was actually altered and only update last_changed in that case but for the sake of actually understanding how to correctly code the main question I’d like to see this as a separate code block if at all.

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1 Answer

  1. Editorial Team

    Hmm…. just because the primary key is made up of two columns shouldn’t really make a big difference….

    CREATE TRIGGER dbo.trgAfterUpdate ON dbo.YourTable
AFTER INSERT, UPDATE 
AS
  UPDATE dbo.YourTable
  SET last_changed = GETDATE()
  FROM Inserted i
  WHERE dbo.YourTable.listid = i.listid AND dbo.YourTable.custid = i.custid

    You just need to establish the JOIN between the two tables (your own data table and the Inserted pseudo table) on both columns…

    Are am I missing something?? …..

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