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Posted by Erland Sommarskog on 01/03/07 22:38
Rico (you@me.com) writes:
> I have a table that has a UserUpdated field which has a default value of
> SUSER_SNAME(). This works great when the record is created, but I'd
> like to also update this value when the record is changed. If I
> understand things correctly, I'll need a trigger to do this, but I've
> never created a trigger before. Is this an easy thing to accomplish?
CREATE TRIGGER tbltri ON tbl FOR INSERT,UPDATE AS
UPDATE tbl
SET moduser = SYSTEM_USER
FROM tbl t
JOIN inserted i ON t.pkcol = i.pkcol
SYSTEM_USER is the ANSI version of suser_sname() and easier to spell. :-)
The table "inserted" is a virtual tables that holds the rows that
were inserted or the after-image of the updated rows. There is also
a table "deleted" which holds deleted rows and the before-image of
updated rows.
A trigger fires once per statement, so there can be many rows in these
tables.
--
Erland Sommarskog, SQL Server MVP, esquel@sommarskog.se
Books Online for SQL Server 2005 at
http://www.microsoft.com/technet/prodtechnol/sql/2005/downloads/books.mspx
Books Online for SQL Server 2000 at
http://www.microsoft.com/sql/prodinfo/previousversions/books.mspx
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