Trouble understanding query results

Question

select SMS_R_System.Name from SMS_R_System order by SMS_R_System.Name
The query produces simple results as expected:
Name
LABS-W7-TEST1 
LABS-WXP-TEST1 
LSDWD-SCMAPP1 
LSDWD-UWSWS1 
LSDWD-UWSWS2 
But adding an additional item to the query starts producing unexpected duplicates:
select SMS_R_System.Name, SMS_G_System_PROCESSOR.NumberOfLogicalProcessors from  SMS_R_System inner join SMS_G_System_PROCESSOR on SMS_G_System_PROCESSOR.ResourceId = SMS_R_System.ResourceId order by SMS_R_System.Name
Why does this query produce a couple of duplicated results?
Name                   Processor.Number of Logical Processors
LABS-W7-TEST1   1 
LABS-WXP-TEST1 1 
LSDWD-SCMAPP1 2 
LSDWD-UWSWS1 1 
LSDWD-UWSWS1 1 
LSDWD-UWSWS2 1 
LSDWD-UWSWS2 1 
The more items I add to the query, the more duplication. Even checking the Omit duplicate rows (select distinct) doesn't solve the problem:
select distinct SMS_R_System.Name, SMS_G_System_SYSTEM.SMSID, SMS_G_System_PROCESSOR.NumberOfLogicalProcessors, SMS_G_System_X86_PC_MEMORY.TotalPhysicalMemory, SMS_G_System_LOGICAL_DISK.Size from SMS_R_System inner join SMS_G_System_PROCESSOR on SMS_G_System_PROCESSOR.ResourceID = SMS_R_System.ResourceId inner join SMS_G_System_X86_PC_MEMORY on SMS_G_System_X86_PC_MEMORY.ResourceID = SMS_R_System.ResourceId inner join SMS_G_System_LOGICAL_DISK on SMS_G_System_LOGICAL_DISK.ResourceID = SMS_R_System.ResourceId inner join SMS_G_System_SYSTEM on SMS_G_System_SYSTEM.ResourceID = SMS_R_System.ResourceId order by SMS_R_System.Name
Name                  Configuration Manager GUID                                  
ProcMemory      Logical Disk
LABS-W7-TEST1   GUID:772F69EE-7882-4663-B31E-17378D13C159   1   3071544     51097  
LABS-W7-TEST1   GUID:772F69EE-7882-4663-B31E-17378D13C159   1   3071544    
LABS-WXP-TEST1  GUID:D50AC145-C365-4BC0-AB20-019015BCB883   1   1023472     51191  
LABS-WXP-TEST1  GUID:D50AC145-C365-4BC0-AB20-019015BCB883   1   1023472    
LSDWD-SCMAPP1   GUID:EEA484BD-4A9A-4DC2-B1DA-D61E41B2B5E7   2   12582388    102046 
LSDWD-SCMAPP1   GUID:EEA484BD-4A9A-4DC2-B1DA-D61E41B2B5E7   2   12582388       
LSDWD-UWSWS1    GUID:919F425D-1B39-4095-A668-80674D01939D   1   3145272     81816  
LSDWD-UWSWS1    GUID:919F425D-1B39-4095-A668-80674D01939D   1   3145272    
LSDWD-UWSWS2    GUID:CEAC8150-7BCC-4C93-8E7B-2CA6DF46B6BF   1   2096616     102398 
LSDWD-UWSWS2    GUID:CEAC8150-7BCC-4C93-8E7B-2CA6DF46B6BF   1   2096616    
What is the key to getting the latest record if multiple rows of the same information is stored in the database?

Answer 1

Multiple rows will show for the same device if it has multiple CPUs (not to confuse with cores)...
If a device has 2 physical CPUs, then 2 rows will exist in v_GS_PROCESSOR (TSQL equivalent): DeviceID0 = CPU0 & CPU1. Each CPU has x cores as per the field "NumberOfLogicalProcessors0".
E.g. select top(100) DeviceID0, SocketDesignation0, NumberOfLogicalProcessors0, SystemName0 from v_GS_PROCESSOR order by systemname0 asc
If you want to know how many logical processors (cores) and you were using TSQL, then you could use a inner join to only show systems that have cores (not null) and use "sum" to add them up in case of multiple rows. A "left" join would
also show systems that have a null value for NumberOfLogicalProcessors0.
You cannot use "sum" in WQL...
select
SYS.Name0,sum(CPU.NumberOfLogicalProcessors0) As 'NumProcessors'
from v_R_System As SYS
inner join v_GS_PROCESSOR As CPU on CPU.ResourceId = SYS.ResourceId
group by SYS.Name0, CPU.NumberOfLogicalProcessors0
order by SYS.Name0 Asc
E.g. results
LABS-W7-TEST1   1 
LABS-WXP-TEST1 1 
LSDWD-SCMAPP1 2 
LSDWD-UWSWS1 2
LSDWD-UWSWS2 2
To get only one row (one CPU), you can use "GROUP BY".
e.g.
SELECT
SMS_R_System.Name, SMS_G_System_PROCESSOR.NumberOfLogicalProcessors
FROM
SMS_R_System
inner join SMS_G_System_PROCESSOR on SMS_G_System_PROCESSOR.ResourceId = SMS_R_System.ResourceId
GROUP BY SMS_R_System.Name, SMS_G_System_PROCESSOR.NumberOfLogicalProcessors
ORDER BY SMS_R_System.Name