Collection in a XML schema.

Question

Hello!
I would like to see some example code of how to use collections in an XML schema.
Thank you.

Answer 1

Hi Scott,
2) Yes, FOR XML PATH clause converts relational data to XML format with a specific structure for the "marvel" Table. Regarding validate all the avenger_names, please see below
sample.
DECLARE @x XML
SELECT @x=(SELECT ID ,avenger_name FROM marvel FOR XML PATH('Marvel'))
SELECT @x
SELECT
n.value('avenger_name[1]','VARCHAR(99)') avenger_name,
n.value('ID[1]','INT') ID
FROM @x.nodes('//Marvel') Tab(n)
WHERE n.value('ID[1]','INT') = 1 -- specify the ID here
--FOR XML PATH('Marvel')  --uncommented this line if you want the result as element type
3)i.check the xml schema content
--find xml schema collection
SELECT ss.name,xsc.name collection_name FROM sys.xml_schema_collections xsc JOIN sys.schemas ss ON xsc.schema_id= ss.schema_id
select * from sys.schemas
--check the schema content,use the name,collection_name from the above query
SELECT xml_schema_namespace(N'name',N'collection_name')
3)ii. View can be viewed as virtual table. Use a view to list the XML schema content.
CREATE VIEW XSDContentView
AS
SELECT ss.name,xsc.name collection_name,cat.content
FROM sys.xml_schema_collections xsc JOIN sys.schemas ss ON xsc.schema_id= ss.schema_id
CROSS APPLY(
SELECT xml_schema_namespace(ss.name,xsc.name) AS content
) AS cat
WHERE xsc.name<>'sys'
GO
SELECT * FROM XSDContentView
By the way, it would be appreciated if you can spread your questions into posts. For any question, feel free to let me know.
Eric Zhang
TechNet Community Support