Beginning Microsoft SQL Server 2008 ... - S3 Tech Training

Appendix A: System Functions
The query parameter is a string that is executed by the provider and is used instead of a combination of
catalog, schema, and object.
OPENXML
By passing in an XML document as a parameter, or by retrieving an XML document and defining the
document within a variable, OPENXML allows you to inspect the structure and return data, as if the XML
document were a table. The syntax is as follows:
OPENXML( [in], nvarchar[in],[ byte[in]])
[WITH ( | )]
The idoc_int parameter is the variable defined using the sp_xml_prepareddocument system sproc.
Rowpattern is the node definition. The flags parameter specifies the mapping between the XML document
and the rowset to return within the SELECT statement. SchemaDeclaration defines the XML
schema for the XML document; if there is a table defined within the database that follows the XML
schema, then TableName can be used instead.
Before being able to use the XML document, it must be prepared by using the
sp_xml_preparedocument system procedure.
Security Functions
The security functions return information about users and roles. They are:
❑ HAS_DBACCESS
❑ IS_MEMBER
❑ IS_SRVROLEMEMBER
❑ SUSER_ID
❑ SUSER_NAME
❑ SUSER_SID
❑ USER
❑ USER_ID
❑ USER_NAME
HAS_DBACCESS
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The HAS_DBACCESS function is used to determine whether the user that is logged in has access to the
database being used. A return value of 1 means the user does have access, and a return value of 0 means
that he or she does not. A NULL return value means the database_name supplied was invalid. The syntax
is as follows:
HAS_DBACCESS (‘’)