| title | description | author | ms.author | ms.date | ms.service | ms.subservice | ms.topic | helpviewer_keywords | dev_langs | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
upper-case Function (XQuery) |
Learn how to use the XQuery function upper-case(), that converts characters to their upper case equivalent. |
rothja |
jroth |
03/09/2017 |
sql |
xml |
language-reference |
|
|
[!INCLUDE SQL Server Azure SQL Database]
This function converts each character in $arg to its upper case equivalent. The Microsoft Windows binary case conversion for Unicode code points specifies how characters are converted to upper case. This standard is different than the mapping for Unicode standard code point standard.
fn:upper-case($arg as xs:string?) as xs:string
| Term | Definition |
|---|---|
| $arg | The string value to be converted to upper case. |
If the value of $arg is empty, a zero length string is returned.
The following example changes the input string 'abcDEF!@4' to upper case.
DECLARE @x xml = N'abcDEF!@4';
SELECT @x.value('fn:upper-case(/text()[1])', 'nvarchar(10)');
This example shows how to use the upper-case function to perform a case-insensitive search.
USE AdventureWorks2022;
GO
--WITH XMLNAMESPACES clause specifies the namespace prefix
--to use.
WITH XMLNAMESPACES ('https://schemas.microsoft.com/sqlserver/2004/07/adventure-works/ProductModelDescription' AS pd)
--The XQuery contains() function is used to determine whether
--any of the text nodes below the <Summary> element contain
--the word 'frame'. The upper-case() function is used to make
--the search case-insensitive.
SELECT ProductModelID, CatalogDescription.query('
<Prod>
{ /pd:ProductDescription/@ProductModelID }
{ /pd:ProductDescription/pd:Summary }
</Prod>
') as Result
FROM Production.ProductModel
where CatalogDescription.exist('
/pd:ProductDescription/pd:Summary//text()[
contains(upper-case(.), "FRAME")]') = 1
[!INCLUDEssResult]
ProductModelID Result
-------------- ---------
19 <Prod ProductModelID="19">
<pd:Summary xmlns:pd="https://schemas.microsoft.com/sqlserver/2004/07/adventure-works/ProductModelDescription">
<p1:p xmlns:p1="http://www.w3.org/1999/xhtml">Our top-of-the-line competition mountain bike.
Performance-enhancing options include the innovative HL Frame,
super-smooth front suspension, and traction for all terrain.
</p1:p>
</pd:Summary>
</Prod>
25 <Prod ProductModelID="25">
<pd:Summary xmlns:pd="https://schemas.microsoft.com/sqlserver/2004/07/adventure-works/ProductModelDescription">
<p1:p xmlns:p1="http://www.w3.org/1999/xhtml">This bike is ridden by race winners. Developed with the
Adventure Works Cycles professional race team, it has a extremely light
heat-treated aluminum frame, and steering that allows precision control.
</p1:p>
</pd:Summary>
</Prod>