Question : Creating a Trigger to increase column value

Hi All,

I haven't a clue how to write a trigger but have a feeling this could provide me with a solution on what I want to achieve:

I have a table called tbl_List_items

Within this table there are columns called

ItemID INT (Primary Key)
ParentItemID INT (foreign key) and
ItemRef INT.

What I need help with is after a new record has been inserted/created I need to select the TOP 1 record based on the new records ParentItemID and insert a value of the selected ItemRef + 1 into the new ItemRef  column....

That may not have made a lot of sense but this is an abstract of SQL that I would create within a stored procedure to achieve this:

DECLARE @ItemRef INT
      
SET @ItemRef = (SELECT TOP 1 [ItemRef]+1 FROM [tbl_List_items] WHERE [ParentItemID ] = @ParentItemID  ORDER BY [ItemRef] DESC)


UPDATE [tbl_List_items]
SET
[ItemRef] = @ItemRef
WHERE
ItemID = @ItemID

The reason I can use a stored procedure is that my app also uses ASP.Net's bulk insert which happens directly on the table rather than going through a SPROC. So to me it made sense to try a Trigger.

many thanks,

Rit

Answer : Creating a Trigger to increase column value

The only thing I can thing of would be the use of a CURSOR (which I don't normally recommend) in the trigger.

@Lowfatspread: Any better ideas?