Create view with self join and case statements - sql-server-2008

Question

Sql Server 2008 R2
I have this data:
Id AdOrderId AdRunScheduleId CategoryCode EffectiveDate Amount
735935 3811 1629 0 3/7/14 0:00 72.19
735939 3811 1629 2 3/7/14 0:00 10
735942 3811 1629 7 3/7/14 0:00 -14.44
I would like a view that contains 1 row with all 3 records
I have tried several things. Several work but all give me 3 separate rows.
Here is my latest attempt:
-CREATE View [dbo].[DP_AdOrder_Charges]
--as
SELECT
Elem.Id,
Elem.AdOrderId, Elem.AdRunScheduleId, Elem.EffectiveDate,
Elem.Amount, Elem.CategoryCode,
MAX(Case when Elem.CategoryCode = 0 then Elem.Amount End) as AdInsertAmt,
MAX(Case when Elem.CategoryCode = 2 then Elem.Amount End) as ColorAmt,
MAX(Case when Elem.CategoryCode = 7 then Elem.Amount End) as DiscAmt,
MAX(Case when Elem.CategoryCode not in (0,2,7) then Elem.Amount End) as OtherAmt
FROM [MNADTEST].[dbo].[RtChargeEntryElem] Elem
INNER JOIN [MNADTEST].[dbo].[RtChargeEntryElem] J1
ON Elem.EffectiveDate=J1.EffectiveDate
and Elem.Id=J1.Id
and Elem.AdRunScheduleId=J1.AdRunScheduleId
and Elem.AdOrderId=J1.AdOrderId
Where Elem.AdRunScheduleId=1629
and Elem.EffectiveDate='2014-03-07'
GROUP BY
Elem.Id,Elem.EffectiveDate,
Elem.AdOrderId, Elem.AdRunScheduleId,
Elem.Amount, Elem.RateTableId, Elem.CategoryCode
with this result
Id AdOrderId AdRun Effective Amount Category AdInsertAmt ColorAmt DiscAmt OtherAmt
ScheduleId Date Code
735935 3811 1629 2014-03-07 72.19 0 72.19 NULL NULL NULL
735939 3811 1629 2014-03-07 10 2 NULL 10 NULL NULL
735942 3811 1629 2014-03-07 -14.44 7 NULL NULL -14.44 NULL
I would be grateful for any help.
thanks.
Barb
Here is create table and insert code:
CREATE TABLE [dbo].[RtChg](
[Id] [int] NOT NULL,
[AdOrderId] [int] NULL,
[AdRunScheduleId] [int] NULL,
[CategoryCode] [int] NULL,
[EffectiveDate] [datetime] NULL,
[Amount] [float] NULL
)
GO
INSERT INTO [dbo].[RtChg]
([Id],
[AdOrderId],
[AdRunScheduleId],
[CategoryCode],
[EffectiveDate],
[Amount])
VALUES
(735935, 3811, 1629, 0, '3/7/14', '72.19'),
(735939 ,3811, 1629, 2, '3/7/14', '10.00'),
(735942, 3811, 1629, 7, '3/7/14', '-14.44')
GO

Answer 1

I have this working. I did not need a self join. Also, I was grouping by a unique id instead of the column I want to capture when the value changes.
CREATE View [dbo].[DP_AdOrder_Charges]
as
SELECT
AdOrderId,
Elem.AdRunScheduleId,
Elem.EffectiveDate,
MAX(Case when Elem.CategoryCode = 0 then Elem.Amount End) as AdInsertAmt,
MAX(Case when Elem.CategoryCode = 2 then Elem.Amount End) as ColorAmt,
MAX(Case when Elem.CategoryCode = 7 then Elem.Amount End) as DiscAmt,
MAX(Case when Elem.CategoryCode not in (0,2,7) then Elem.Amount End) as OtherAmt
FROM [MNADTEST].[dbo].[RtChargeEntryElem] Elem
GROUP BY
Elem.AdOrderId,
Elem.AdRunScheduleId,
Elem.EffectiveDate