SQL Server - Trigger to update timestamp

Hi.. I have a LASTUPDATED column in a table. I need to update the value , set it to getdate()
on an UPDATE..   Do I need a trigger?  How can I set the default 'updated' value?
thx
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JElsterAsked:
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Jim HornMicrosoft SQL Server Developer, Architect, and AuthorCommented:
afaik there is no such animal as a default 'updated' value, just default value, so you'll need a trigger to pull this off.  

Copy-paste the below into your SSMS, execute to verify it works, and modify to meet your needs.
CREATE TABLE tmp (
	id int, 
	name varchar(10), 
	dt_updated datetime DEFAULT GETDATE())
GO

	
CREATE TRIGGER trg
ON tmp
FOR UPDATE
AS
UPDATE tmp
    SET dt_updated = GETDATE()
    WHERE id IN (SELECT DISTINCT ID FROM Inserted)
GO
    
INSERT INTO tmp (id, name)
VALUES (1, 'banana')

SELECT * FROM tmp

UPDATE tmp
SET name = 'orange'
WHERE id = 1

SELECT * FROM tmp

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Microsoft SQL Server 2008

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