How to: Create trigger for auto update modified date with SQL Server 2008

Question

It would be nice to know how to create a trigger that auto-updates the modifiedDate column in my SQL Server table:

Table TimeEntry

Answer 1

My approach:

• define a default constraint on the ModDate column with a value of GETDATE() - this handles the INSERT case

• have a AFTER UPDATE trigger to update the ModDate column

Something like:

CREATE TRIGGER trg_UpdateTimeEntry
ON dbo.TimeEntry
AFTER UPDATE
AS
    UPDATE dbo.TimeEntry
    SET ModDate = GETDATE()
    WHERE ID IN (SELECT DISTINCT ID FROM Inserted)