Configuration Manager Extended WMI Query Language
System Center Configuration Manager 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:
UPPER, LOWER, and
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
Association queries are limited to the WQL syntax.
The use of
DISTINCT keywords together in a statement is not supported.
In System Center Configuration Manager the
WHERE clause supports
ORDER BY clause does not work with the collection-limiting context qualifier.
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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