-- ================================================
-- Template generated from Template Explorer using:
-- Create Trigger (New Menu).SQL
--
-- Use the Specify Values for Template Parameters 
-- command (Ctrl-Shift-M) to fill in the parameter 
-- values below.
--
-- See additional Create Trigger templates for more
-- examples of different Trigger statements.
--
-- This block of comments will not be included in
-- the definition of the function.
-- ================================================
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

drop  TRIGGER dbo.TestBase_change 
GO

-- =============================================
-- Author:		RDEM
-- Create date: 
-- Description:	
-- =============================================
CREATE TRIGGER dbo.TestBase_change 
   ON  dbo.TestBase 
   AFTER INSERT,DELETE,UPDATE
AS 
BEGIN
	-- SET NOCOUNT ON added to prevent extra result sets from
	-- interfering with SELECT statements.
	SET NOCOUNT ON;
    
    -- Insert statements for trigger here
	insert into dbo.TestBaseVersioningExp(row_type,Id,NewDescription,OldDescription,CreatedAt)
	select 'inserted',a.Id,a.Description,'',a.CreatedAt 
	from inserted a 
	where not exists (select * from deleted where id =a.Id )
	union all
	select 'deleted',a.Id,'' ,a.Description,a.CreatedAt 
	from deleted a
	where not exists (select * from inserted where id =a.Id )
	union all
	select 'updated',a.Id,a.Description,b.Description,a.CreatedAt 
	from inserted  a join deleted b on a.Id=b.Id
	where exists (select * from deleted where id =a.Id )
END
GO