how to read this xml in sql server - sql

Question

I am having xml as result for webservice api . i need to parse the result and update to database table. my xml is below . it is a response text.
<?xml version="1.0" encoding="utf-8"?>
<double>1</double>
Sqlserver 2008 Code :
declare #xml xml, #rate DECIMAL(10,4)
set #xml=REPLACE(#ResponseText ,'encoding="utf-8"','')
select #rate= #xml.value('(/double)[1]','decimal')
I want to get the value of double but it always return the null .
Please help me out .
Hi , have Done changes as per your suggestion still no getting.
declare #xml XML
DECLARE #responsetext VARCHAR(900)
declare #rate DECIMAL(10,4)
SET #responsetext = '<?xml version="1.0" encoding="utf-8"?>
<double xmlns="http://www.webserviceX.NET/">1</double>'
set #xml=REPLACE(#ResponseText ,'encoding="utf-8"','')
select #rate= #xml.value('(/double)[1]','decimal')
select #rate

Answer 1

You need to declare the namespace when querying using the value() Method.
Change the first parameter of value() from
'(/double)[1]'
to
'declare namespace x="http://www.webserviceX.NET/"; (/x:double)[1]'
So the full example will look like this
declare #xml XML
DECLARE #responsetext VARCHAR(900)
declare #rate DECIMAL(10,4)
SET #responsetext = '<?xml version="1.0" encoding="utf-8"?>
<double xmlns="http://www.webserviceX.NET/">1</double>'
set #xml=REPLACE(#ResponseText ,'encoding="utf-8"','')
select #rate= #xml.value('declare namespace x="http://www.webserviceX.NET/"; (/x:double)[1]','decimal')
select #rate
which should return 1.000 (decimal)

Answer 2

DECLARE #X XML = '<?xml version="1.0" encoding="utf-8"?>
<double xmlns="http://www.webserviceX.NET/">1</double>'
SELECT #X.value ('declare namespace x="http://www.webserviceX.NET/"; (/x:double)[1]', 'decimal')
Updated to reflect your use of namespace; the general point is that you don't need to do string manipulation to make this work. The header is fully supported. However, namespaces are important.

Answer 3

Not an answer, just some sample code - this returns a 1, not a NULL:
declare #xml xml, #rate DECIMAL(10,4)
declare #ResponseText varchar(900)
set #ResponseText = '<?xml version="1.0" encoding="utf-8"?> <double>1</double>'
set #xml=REPLACE(#ResponseText ,'encoding="utf-8"','')
select #rate= #xml.value('(/double)[1]','decimal')
select #rate