Question : SQL to calculate sales per representative and per week

I have problems putting together a SQL command that calculates sales per representative.
With the command below I can show the total sales, but the result I want is the following:
a grid with on the x-axis the names of the representatives (eg John Paul George Ringo Total) and on the y-axis the dates of the orders.
The grid would be filled from the total sales per week and per representative.
How do I get this done?

Example:

Paul George Ringo John Total
2010-1-1 10 15 10 5 40
2010-1-8 5 10 5 30 50

Code Snippet:

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SELECT [Orderdetails].Odt_dtmvDatum, SUM([Orders].Ord_bdrTotaal) as Total
FROM [Orders]
INNER JOIN [Orderdetails]
ON [Orders].Ord_ID = [Orderdetails].Odt_Ord_ID
GROUP BY [Orderdetails].Odt_dtmvDatum
HAVING YEAR([Orderdetails].Odt_dtmvdatum) = 2010
ORDER BY [Orderdetails].Odt_dtmvDatum

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Answer : SQL to calculate sales per representative and per week

oops, missed the where clause

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declare @cols varchar(max) 
declare @strSQL varchar(max) 
 
set @cols = stuff((select distinct '], [' + cast(representativecolumn as varchar) from Orders for xml path('')), 1, 2, '') + ']' 
 
set @strSQL = 'select week, ' + @cols + ' from  
( 
select dateadd(d, 7 - datepart(dw, b.Odt_dtmvdatum), b.Odt_dtmvdatum) as week,  
                a.Representativecolumn,  
                a.Ord_bdrTotaal  
                from Orders a 
                INNER JOIN [Orderdetails] b ON a.Ord_ID = b.Odt_Ord_ID  
                WHERE YEAR(b.Odt_dtmvdatum) = 2010 
) o  
pivot (sum(Ord_bdrTotaal) for Representativecolumn in ( ' + @cols + '))p 
' 
 
exec(@strSQL)

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