Help with simple sql statement usiing Rank function..

Question

Hello I have very important question..this is how i have a dataset...
This is the Log Table 
And the actual Table holds the current value.   12345
Current Table 
12345    575 232 4567
Log Table Values
Objectid InvalidatedTime
PhoneArea
Phoneno Rank
12345   2014-04-23
570          
822-4438      0  
3
12345   2014-04-28
NULL
658-7789      0
2
12345   2014-05-09
578        
658-8521      0 
1
As you can see on 23 they invlalidated the areacode and phone no and changed it to .. 578 658-8521 but on 04-28 they just changed the phone no and not the area code.. 
I want the result set to be like this
Date Fromvalue   
ToValue  
2014-04-23 
570-822-4438      
  578 658-7789
2014-04-28 578 658-7789 
578 658-8521
2014-05-09  578 658-8521
575 
232 4567
 I have tried this code.. 
select 
--'Home Phone',
--tt.invalidationtime ,
--Case when 
-- tt.*,tt_prev.* --,
'Home Phone' as PropertyName,
tt.invalidationtime,
case when tt.rank1 = 1 then tt.phoneareacode+'-'+tt.phoneno
when tt.rank1 <> 1 then Isnull(tt.phoneareacode,tt_prev.phoneareacode)+'-'+ isnull(tt.phoneno,tt_prev.phoneno)
end as FromAddress,
case when tt.rank1 = 1 then Haddress.phoneareacode+'-'+HAddress.phoneno
when tt.rank1 <> 1 then Isnull(tt_prev.phoneareacode,tt.phoneareacode)+'-'+isnull(tt_prev.phoneno,tt.phoneno)
end as ToPhone
from
 #Phone_Final  tt
left join  #Phone_Final tt_prev on tt_prev.objectid = tt.objectid and tt.rank1-11 = tt_prev.rank1
inner join (select * from Soarian_Clin_Prd_1.dbo.Haddress   where PP_id = 2346   and Addresstype = 0) Haddress
Can you please tell me what is wrong here.. 

Answer 1

should be this I reckon
;With CTE
AS
SELECT ROW_NUMBER() OVER (PARTITION BY ObjectID ORDER BY InvalidatedTime) AS Seq, *
FROM
SELECT ObjectID,InvalidatedTime,PhoneArea,Phoneno,Rank
FROM LogTable
UNION ALL
SELECT ObjectID, GETDATE(),PhoneArea,Phoneno,NULL
FROM Current
)t
SELECT c1.InvalidatedDate AS [Date],
COALESCE(c1.PhoneArea,c2.PhoneArea,'') + c1.Phoneno AS FromValue,
COALESCE(c2.PhoneArea,c1.PhoneArea,'') + c2.Phoneno AS ToValue
FROM CTE c1
INNER JOIN CTE c2
ON c2.Objectid = c1.Objectid
AND c2.Seq = c1.Seq + 1
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