From: esquel@sommarskog.se   
      
   phdate (drscrypt@gmail.com) writes:   
   > Unfortunately not.  I use this technique elsewhere but what I need is   
   > the ability to generate such numbers one at a time.  And sometimes, I   
   > need 2 or 3 of these at a time, depending on the results of the formulas   
   > I use in the package.   
      
   Instead of row_number, you can use a correlated subquery with COUNT(*):   
      
      SELECT O.OrderID, O.CustomerID, O.OrderDate,   
             (SELECT COUNT(*)   
              FROM   Orders O2   
              WHERE  O2.CustomerID = O.CustomerID   
                AND  O2.OrderID   <= O.OrderID) AS OrdnoForCustomer   
      FROM    Orders O   
      ORDER   BY O.CustomerID, O.OrderID   
      
   The performance for larger result sets is awful, but for 2-3 it should   
   not be a problem.   
      
   --   
   Erland Sommarskog, SQL Server MVP, esquel@sommarskog.se   
      
   Links for SQL Server Books Online:   
   SQL 2008: http://msdn.microsoft.com/en-us/sqlserver/cc514207.aspx   
   SQL 2005: http://msdn.microsoft.com/en-us/sqlserver/bb895970.aspx   
   SQL 2000: http://www.microsoft.com/sql/prodinfo/previousversions/books.mspx   
      
   --- SoupGate-Win32 v1.05   
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