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xml Data Type Methods

You can use the xml data type methods to query an XML instance stored in a variable or column of xml type. The topics in this section describe how to use the xml data type methods.

Topic

Description

query() Method (xml Data Type)

Describes how to use the query() method to query over an XML instance.

value() Method (xml Data Type)

Describes how to use the value() method to retrieve a value of SQL type from an XML instance.

exist() Method (xml Data Type)

Describes how to use the exist() method to determine whether a query returns a nonempty result.

modify() Method (xml Data Type)

Describes how to use the modify() method to specify XML Data Modification Language (XML DML)statements to perform updates.

nodes() Method (xml Data Type)

Describes how to use the nodes() method to shred XML into multiple rows, which propagates parts of XML documents into rowsets.

Binding Relational Data Inside XML Data

Describes how to bind non-XML data inside XML.

Guidelines for Using xml Data Type Methods

Describes guidelines for using the xml data type methods.

You call these methods by using the user-defined type method invocation syntax. For example:

SELECT XmlCol.query(' ... ')
FROM   Table
NoteNote

The xml data type methods query(), value(), and exist() return NULL if executed against a NULL XML instance. Also, modify() does not return anything, but nodes() returns rowsets and an empty rowset with a NULL input.

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