SQL Report - Software count for specific hostnames

Question

Hi all,
I'm currently using the below query to get the count of all software in Add/Remove Programs for a specific collection:
Declare @CollID char(8)
Set @CollID = 'XXX00001'
SELECT DisplayName0, Count(*) AS 'Count', Publisher0, Version0, @CollID as CollectionID
FROM v_Add_Remove_Programs arp
JOIN v_FullCollectionMembership fcm on arp.ResourceID=fcm.ResourceID
WHERE fcm.CollectionID = @CollID and
GROUP BY DisplayName0, Publisher0, Version0
ORDER BY Publisher0, Version0
Now, what I would like to do is to specify the All Systems collection ID (not a problem) but add a couple of extra condition:
I want to run the query only WHERE the hostnames start with SITE1 or SITE2.
How can I modify the above to achieve the results I'm expecting? I'm getting stuck here and there :(
Thanks a lot

Answer 1

Thanks Torsten, you put me on the right direction.
If somebody's interested, this is the query I'm running now:
Declare @CollID char(8)
Set @CollID = 'XXX00001'
SELECT DisplayName0, Count(*) AS 'Count', Publisher0, Version0, @CollID as CollectionID
FROM v_Add_Remove_Programs arp
JOIN v_FullCollectionMembership fcm on arp.ResourceID=fcm.ResourceID
JOIN v_R_System_Valid rsv on arp.ResourceID=rsv.ResourceID
WHERE fcm.CollectionID = @CollID and rsv.Netbios_Name0 LIKE '%SITECODE1%' GROUP BY DisplayName0, Publisher0, Version0
ORDER BY Publisher0, Version0