I have a Datawarehouse as below, and it seems WHERE is not responding. Why would that be ? many thanks in advance.

SELECT
SalesOrderNumber AS InvoceNumber, 
OrderDate,
SUM(SalesAmount) AS SalesAmount,
SUM(TaxAmt) AS TaxAmt,
SUM(OrderQuantity) AS OrderQuantity


FROM FactInternetSales

WHERE SalesOrderNumber =  'S067876'

GROUP BY SalesOrderNumber, OrderDate