How to "Group By" within SWQL query using filter (Limit, TopKey, etc.)

I am attempting to generate the results I get from Flow Navigator when I filter by Citrix ports (1494, 2598) using an SWQL query within the SWQL Studio.

I currently have the following:

SELECT ApplicationName, MapTo, TotalBytes, TotalBytesIngress, TotalBytesEgress

FROM Orion.NetFlow.ApplicationsTop(Filter='NSF:TD:2015-03-23T04:00:00~2015-03-23T19:00:00,1,True,True;FD:Both', Limit=1000, Rx=True, Tx=True, TopKey='1494')

The above gives me all instances of traffic from all interfaces matching port 1494. I am wanting to do a GROUP BY clause to get the SUM of traffic based on port 1494 in one row but I can't figure out the correct syntax to do so. I can't simply do a "GROUP BY AppID" as this does not filter the results without a SUM function under the SELECT clause.

Furthermore, I don't know how to filter by both port 1494 and 2598 using the filter above (TopKey does not accept more than one value).

Finally, I would love to be able to use DATEPART commands in the query like the following in order to exclude non-business hours :

(

   (DATEPART(weekday, DateTime) > 1) AND

   (DATEPART(weekday, DateTime) < 7) AND

   (DatePart(Hour,DateTime) >= 4) AND

   (DatePart(Hour,DateTime) <= 19)

)

However, WSQL Studio states "Unable to resolve property weekday".

Any assistance would be greatly appreciated.