NULLIF(HistoryTable.Col1 = MainTable.Col1)

GO
IF OBJECT_ID('TempDB..#OrginalTable','U') IS NOT NULL
	DROP TABLE #OrginalTable
	
IF OBJECT_ID('TempDB..#HistoryTable','U') IS NOT NULL
	DROP TABLE #HistoryTable 
        
CREATE TABLE #OrginalTable(
	ID INT IDENTITY(1,1) PRIMARY KEY CLUSTERED,
	A CHAR(1),
	B CHAR(1),
	C CHAR(1),
	D CHAR(1),
	E CHAR(1)
)

CREATE TABLE #HistoryTable(
	Change NVARCHAR(10),
	DateValue SMALLDATETIME,
	ID INT,
	A CHAR(1),
	B CHAR(1),
	C CHAR(1),
	D CHAR(1),
	E CHAR(1),
	PRIMARY KEY (DateValue,ID)
)
       
--- SOME SAMPLE DATA FINAL STATE
INSERT INTO #OrginalTable
SELECT '1','b','c','R','e' UNION ALL
SELECT '0','Y','W','Z','9' 

--- SAMPLE TRIGGER DATA
INSERT INTO #HistoryTable
SELECT 'UPDATE','03/20/2013',1,'a','b','c','d','e' UNION ALL -- Row 1 - Orignal
SELECT 'UPDATE','03/21/2013',1,'1','b','c','d','e' UNION ALL -- Row 1 - After 1st change 
SELECT 'UPDATE','03/20/2013',2,'X','Y','W','Z','Z' UNION ALL -- Row 2 - Orignal
SELECT 'UPDATE','03/21/2013',2,'0','Y','W','Z','Z' -- Row 2 - After 1st change 

*EDITED* - Something similar to this, but only the first line complete, and the other lines, only show the values that are different from the previous line... In this sample the second row, only the "visible" the d value, in the third row the a value...

SELECT [DateValue] = GETDATE(), [Type] = 'Final',A ,B ,C ,D ,E FROM #OrginalTable WHERE ID = 1 UNION ALL
SELECT DateValue , Change , A ,B ,C ,D ,E FROM #HistoryTable WHERE ID = 1 ORDER BY DateValue DESC

WITH CTE_History AS (
	SELECT ROW_NUMBER() OVER(ORDER BY DateValue DESC) AS RowNum,* 
	FROM #HistoryTable 
	WHERE ID = 1
)