DATEADD getting a Syntax error

Question

I am trying to change my Promise Date when the SD.Status = 'Hold' to add 100 years so that when it sorts it it comes out at the bottom of the extract. I want the Promised Date to not change if the SD.Status is not equal to 'Hold'. The Sd.Promise_Date field
is a DateTime field. I do not see my error. See my code and error message below.
Select SD.Sales_Order                                              As [SO #]
      ,SD.SO_Line                                                        As [Ln]
      ,Cast(Min(SD.Status) As Varchar(1))                   As [SS] 
      ,Min(SH.Sales_Rep)                                            As [Rep]
      ,Min(SH.Customer)                                             As [Cust ID]
      ,Min(SD.Material)                                                As [Material/Part Number]
      ,Min(Case when SD.Material = 'CUSTOM-SPECIAL' then (Substring(SD.EXT_Description,1,30))
              else M.Description end)                             As [Description]
      ,Min(Case when SD.Status = 'Hold'                                             then 'HOLD'
              when PATINDEX('%Ship complete%', SH.Comment)>0       then 'SC'
              when PATINDEX('%In CustomerID%', SH.Comment)>0      then 'ICSL'
              when SH.Ship_Via = 'Cust Stock'                                        then 'CSTK'
         when SH.Ship_Via = 'Install'                                           then 'INST'
     else '' end)                                                     [Txt]
,Min(Case when SD.Job Is Not null                                           then SD.Job
              when PATINDEX('%SO Given to RonF%',  SH.Note_Text)>0 then 'RON F'
              when PATINDEX('%SO Given to Cut%',   SH.Note_Text)>0 then 'CUT'
              when PATINDEX('%SO Given to Joe%',   SH.Note_Text)>0 then 'JOE'
              when PATINDEX('%SO Given to Laser%', SH.Note_Text)>0 then 'LASER'
     when SD.Job IS null                                  then ''
     else '' end)                                                    [Linked]
,Min(ISNULL(SD.PO,''))                                                 As [PO]  
,Cast(MIN(ISNULL(J.Status,''))As Varchar(1))               As [St]
,Cast(SUM((SD.Order_Qty - SD.Shipped_Qty) * (100 - SD.Discount_Pct) * SD.Unit_Price / 100) As Decimal(7,2)) As [Ext Amt]
,Min(SD.Order_Qty)                                         As [Ord]
,Min(SD.Picked_Qty)                                        As [Pick]
,Min(SD.Backorder_Qty)                                  As [BO]
,Cast(Min(SH.Order_Date) As Date)                As [Ord Date]
,Min(M.Lead_Days)                                          As [LD]
,(Case when SD.Status = 'Hold'
      then DATEADD(yyyy,100,'SD.Promised_Date')
      else DATEADD(yyyy,0,'SD.Promised_Date') PromDate end)
,Cast(PromDate as Date)                                    As [Promised]
  from [PRODUCTION].dbo.SO_Detail As SD
INNER JOIN [PRODUCTION].dbo.SO_Header As SH
on SD.Sales_Order = SH.Sales_Order
and (SD.Status = 'Open' 
         or  SD.Status = 'Backorder'
         or  SD.Status = 'Hold' ) 
INNER JOIN [PRODUCTION].dbo.Material As M
on SD.Material = M.Material
LEFT OUTER JOIN [PRODUCTION].dbo.Job As J
On SD.Job = J.Job
Group by SD.Promised_Date, SD.Sales_Order, SD.SO_Line
Order by SD.Promised_Date, SD.Sales_Order, SD.SO_Line
Msg 102, Level 15, State 1, Line 32
Incorrect syntax near 'PromDate'.
SWProduction

Answer 1

OK thanks.... that made the code execute and it changed the output Promised_Date but it appears to have done it after the Group and Order by processes. Is there a way to make this happen before the Group and Order by processes take effect. I am looking for
output to be:
2014-05-30
2014-06-01
2114-06-01
2014-06-21
2114-06-22
etc.
it appears now as:
2014-05-30
2114-06-01
2014-06-01
2014-06-21
2114-06-22
SWProduction
for that you need to do changes in GROUP BY and ORDER BY as well
as below
Group by DATEADD(yyyy,CASE WHEN SD.Status = 'Hold' THEN 1000 ELSE 0 END,SD.Promised_Date), SD.Sales_Order, SD.SO_Line
Order by DATEADD(yyyy,CASE WHEN SD.Status = 'Hold' THEN 1000 ELSE 0 END,SD.Promised_Date), SD.Sales_Order, SD.SO_Line
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