How to: Create trigger for auto update modified date with SQL Server 2008
It would be nice to know how to create a trigger that auto-updates the modifiedDate
column in my SQL Server table:
Table TimeEntry
Id (PK)
UserId (FK)
Description
Time
GenDate
ModDate
Trigger code:
+ TR_TimeEntry_UpdateModDate()
+ TR_TimeEntry_InsertGenDate()
An example for update ModDate
would be nice.
My approach:
define a default constraint on the
ModDate
column with a value ofGETDATE()
- this handles theINSERT
casehave a
AFTER UPDATE
trigger to update theModDate
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)