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create update trigger


create update trigger

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icampbell
icampbell
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I have a view called view_badge and a table called t_badge.
Both the table and the view have the same structure

create table t_badge

       YEAR (varchar(12),not null),
          STU_CODE (varchar(12) primary key,not null),
          JOIN_CODE (varchar(12),not null),
          FORENAME1 (varchar(30),null),
          FORENAME2 (varchar(30),null),
          SURNAME (varchar(40),null),
          DOB (datetime,null)
         COURSE (varchar(18),not null),
         END_DATE (datetime,null))

how would a create an update trigger on view_badge to update t_badge on updates to view_badge.
Steve Jones
Steve Jones
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I'm not sure what you mean? If you update the view, it updates the table. The view is just a window into the table, there is nothing in the view to update.

If you need a trigger, then create it on the table and when someone updates the view, which updates the table, the trigger will fire.

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icampbell
icampbell
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The view is not created from the table,

The table is created from the view.

So i created the table then inserted the data from the view.

I have a script which fires every minutes if there any any new rows.
GilaMonster
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icampbell (12/13/2007)
The view is not created from the table,

The table is created from the view.


So what's view based on? Another table? Several tables?


Gail Shaw
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icampbell
icampbell
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The view is based on several tables
Keith DuAime
Keith DuAime
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Keep in mind that this only works when the view is updated and not the underlying table changes that make up the view. If you need to track the changes made to the underlying tables that make up the view you will have to create multiple triggers, one on each table, and/or just create a procedure to handle everything.


IF OBJECT_ID('tr_view_badge') IS NOT NULL
   DROP TRIGGER tr_view_badge
go
create trigger tr_view_badge
   on view_badge
   instead of insert, update, delete
as
BEGIN
   DECLARE @action CHAR(1)
   IF(EXISTS(SELECT * FROM inserted) AND EXISTS(SELECT * FROM deleted))
      SET @action = 'U'
   ELSE IF(EXISTS(SELECT * FROM inserted))
      SET @action = 'I'
   ELSE IF(EXISTS(SELECT * FROM deleted))
      SET @action = 'D'

   IF @action IS NULL
      return

   --Do what you need to the table based on the action

END
GO


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