WMI SQL Queries with Joins

In the samples I saw with WMI, we can use a SQL like query to get system information ( "Select * From SomeWMIClass" ).

Can I use joins to get WMI classes correlated data ??

For example: I want to join Win32_NetworkAdapter with Win32_NetworkAdapterConfiguration to get a result set with information from the two classes in a single resultset.

How to join multiple WMI classes ??

Something like this

Select Win32_NetworkAdapter.AdapterType, Win32_NetworkAdapter.Caption, Win32_NetworkAdapterConfiguration.IPAddress, Win32_NetworkAdapterConfiguration.MACAddress
From Win32_NetworkAdapter, Win32_NetworkAdapterConfiguration
Where Win32_NetworkAdapter.ID = Win32_NetworkAdapterConfiguration.ID ( ??

Thanks.

timhuang
Fri May 07 05:00:29 CDT 2004

Hi,

Thanks for your post. I am checking this issue and will update you with my
findings.

Have a nice day!

Regards,

HuangTM
Microsoft Online Partner Support
MCSE/MCSD

Get Secure! -- www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.

timhuang
Mon May 10 02:02:32 CDT 2004

Hello,

Based on my research, you can do that by view provider by creating the
appropriate mof. Save following text between the lines in a mof file say
a.mof and then run
mofcomp a.mof

Then connect to root\sample_views namespace and get instances of class
Join_NetAdapterAndConfig.

//----------------------mof content-----------------
#pragma namespace("\\\\.\\root\\sample_views")

instance of __Win32Provider as $DataProv
{
Name = "MS_VIEW_INSTANCE_PROVIDER";
ClsId = "{AA70DDF4-E11C-11D1-ABB0-00C04FD9159E}";
ImpersonationLevel = 1;
PerUserInitialization = "True";
};

instance of __InstanceProviderRegistration
{
Provider = $DataProv;
SupportsPut = True;
SupportsGet = True;
SupportsDelete = True;
SupportsEnumeration = True;
QuerySupportLevels = {"WQL:UnarySelect"};
};


[JoinOn("Win32_NetworkAdapter.index =
Win32_NetworkAdapterConfiguration.Index"),
ViewSources
{
"Select * from Win32_NetworkAdapter",
"Select * from Win32_NetworkAdapterConfiguration"
},
ViewSpaces
{
"\\\\.\\root\\cimv2",
"\\\\.\\root\\cimv2"
},
dynamic, provider("MS_VIEW_INSTANCE_PROVIDER")]
class Join_NetAdapterAndConfig
{

[PropertySources{"AdapterType",""}]
string AdapterType;

[PropertySources{"Caption",""}]
string Caption;

[key,
PropertySources{"index","index"}]
uint32 ID;

[PropertySources{"","IPAddress"}]
string IPAddress[];

[PropertySources{"","MACAddress"}]
string MACAddress;

};
//----------------------end of-------------------------

Here's the link to learn more about view provider
http://msdn.microsoft.com/library/en-us/wmisdk/wmi/view_provider.asp

Hope this helps.

Regards,

HuangTM
Microsoft Online Partner Support
MCSE/MCSD

Get Secure! -- www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.