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XQuery Functions against the xml Data Type

This topic and its subtopics describe the functions you can use when specifying XQuery against the xml data type. For the W3C specifications, see http://www.w3.org/TR/2004/WD-xpath-functions-20040723.

The XQuery functions belong to the http://www.w3.org/2004/07/xpath-functions namespace. The W3C specifications use the "fn:" namespace prefix to describe these functions. You do not have to specify the "fn:" namespace prefix explicitly when you are using the functions. Because of this and to improve readability, the namespace prefixes are generally not used in this documentation.

The following table lists the XQuery functions that are supported against the xmldata type.

Category

Function Name

Functions on Numeric Values

ceiling

 

floor

 

round

XQuery Functions on String Values

concat

 

contains

 

substring

 

lower-case Function (XQuery)

 

string-length

 

upper-case Function (XQuery)

Functions on Boolean Values

not

Functions on Nodes

number

local-name Function (XQuery)

namespace-uri Function (XQuery)

Context Functions

last

 

position

Functions on Sequences

empty

 

distinct-values

id Function (XQuery)

Aggregate Functions (XQuery)

count

 

avg

 

min

 

max

 

sum

Constructor Functions (XQuery)

Constructor Functions

Data Accessor Functions

string

 

data

Boolean Constructor Functions (XQuery)

true Function (XQuery)

false Function (XQuery)

Functions Related to QNames (XQuery)

expanded-QName (XQuery)

local-name-from-QName (XQuery)

namespace-uri-from-QName (XQuery)

SQL Server XQuery Extension Functions

sql:column() function (XQuery)

sql:variable() function (XQuery)