Configuration Manager Extended WMI Query Language
Applies To: System Center Configuration Manager 2007, System Center Configuration Manager 2007 R2, System Center Configuration Manager 2007 R3, System Center Configuration Manager 2007 SP1, System Center Configuration Manager 2007 SP2
Configuration Manager 2007 supports a superset of the Windows Management Instrumentation (WMI) Query Language (WQL) known as Extended WQL. Both WQL and Extended WQL are retrieval-only languages that are used to create queries. Neither language can be used to create, modify, or delete classes or instances.
WQL and Extended WQL are based on the American National Standards Institute (ANSI) Structured Query Language (SQL) standard. However, they differ from standard SQL in that they retrieve from classes rather than tables and return instances rather than rows.
Extended WQL supports elements from two versions of ANSI SQL:
ANSI-92, which is the recommended version for most operations.
ANSI-89, which is primarily used only for JOIN operations by Open Database Connectivity (ODBC) applications requiring the services of the WMI ODBC Adapter.
Extended WQL includes a much broader range of operations than WQL. The following list shows the SELECT clauses that Extended WQL supports:
DISTINCT
COUNT
JOIN
WHERE
SUBSTRING
ORDER BY
UPPER, LOWER, and DATEPART functions
Because Extended WQL is fully case-insensitive, the UPPER and LOWER functions are not useful. Extended WQL supports the standard comparison operators (including LIKE and IN) and sub queries.
The SMS Provider does not support querying on system properties. System properties are those preceded by a double underscore prefix, for example __path.
Association queries are limited to the WQL syntax.
The use ofCOUNTand DISTINCT keywords together in a statement is not supported.
In Configuration Manager 2007 the WHERE clause supports GetDate(), DateDiff(), and DateAdd().
The ORDER BY clause does not work with the collection-limiting context qualifier.
See Also
Concepts
Configuration Manager Association Classes
Configuration Manager Bit Field Properties
Configuration Manager Date and Time Formats
Configuration Manager Embedded Objects
How to Use Configuration Manager Objects with Managed Code
Configuration Manager Lazy Properties
Configuration Manager Errors
Configuration Manager Object Security
Configuration Manager Special Queries