if OBJECT_ID('MyResult') is not null
	drop table MyResult

create table MyResult
(
	TBLID int identity(1,1),
	ID int,
	patientName varchar(10),
	age int,
	city varchar(100),
	Mobile int
)

insert MyResult(ID, patientName, age, city, Mobile) 
select 1,'Ramesh',20,'HYD',12345678 union all
select 1,'Ramesh new',20,'HYDERABAD' ,12345678 union all
select 1,'Ramesh new',20,'HYDERABAD' ,87654321

declare @sql nvarchar(max)    
select @sql = COALESCE(@sql + ' union all ', '') + 'select ''' + c.name + ''' as [Column], Max(Cast([' + c.name + '] AS VarChar(MAX))) as [OldValue], Min(Cast([' + c.name + '] AS VarChar(MAX))) as [NewValue] from MyResult having Min(Cast([' + c.name + '] AS VarChar(MAX))) <> Max(Cast([' + c.name + '] AS VarChar(MAX)))' 
from sys.columns c  
inner join sys.objects o on c.object_id = o.object_id and o.type = 'u' 
where o.object_id = object_id('MyResult')
order by c.column_id  

--select @sql

exec sp_executesql @sql