Use XQuery to get at this data - sql-server

Question

I am new to XQuery and am having some problems with it. Here is my example.
I have this variable:
declare #xmlDoc XML
it has the following xml stored in it:
<?xml version="1.0" encoding="utf-8"?>
<NewDataSet>
<xs:schema id="NewDataSet" xmlns="" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
<xs:element name="NewDataSet" msdata:IsDataSet="true" msdata:Locale="">
<xs:complexType>
<xs:choice minOccurs="0" maxOccurs="unbounded">
<xs:element name="Table1">
<xs:complexType>
<xs:sequence>
<xs:element name="Sharedparam" type="xs:string" minOccurs="0" />
<xs:element name="Antoher" type="xs:string" minOccurs="0" />
<xs:element name="RandomParam2" type="xs:string" minOccurs="0" />
<xs:element name="MoreParam" type="xs:string" minOccurs="0" />
<xs:element name="ResultsParam" type="xs:string" minOccurs="0" />
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:choice>
</xs:complexType>
</xs:element>
</xs:schema>
<Table1>
<Sharedparam>shared</Sharedparam>
<Antoher>sahre</Antoher>
<RandomParam2>Good stuff</RandomParam2>
<MoreParam>and more</MoreParam>
<ResultsParam>2</ResultsParam>
</Table1>
<Table1>
<Sharedparam>Hey</Sharedparam>
<Antoher>what </Antoher>
<RandomParam2>do you</RandomParam2>
<MoreParam>think</MoreParam>
<ResultsParam>2</ResultsParam>
</Table1>
<Table1 />
</NewDataSet>
How can I select all the values of Sharedparam? (Or really any decent query that returns values (not xml) would be great.)
What I am really looking to do is get a result set like this:
Name Value1 Value2 Value3 Value4
Sharedparam shared Hey Null Null
Another share what Null Null
....
This would have me ignoring any data beyond "Value4" (and that is acceptable for my use of this data).

Answer 1

Try something like this:
SELECT
TBL.SParam.value('(.)[1]', 'varchar(50)')
FROM
#xmldoc.nodes('/NewDataSet/Table1/Sharedparam') AS TBL(SParam)
Gives me an output of:
(No column name)
shared
Hey
Update: if you want to get at all the XML elements and their values inside the <Table1> elements, you can use this XQuery:
SELECT
TBL.SParam.value('local-name(.)[1]', 'varchar(50)') 'Attribute',
TBL.SParam.value('(.)[1]', 'varchar(50)') 'Value'
FROM
#xmldoc.nodes('/NewDataSet/Table1/*') AS TBL(SParam)
which outputs:
Attribute Value
Sharedparam shared
Antoher sahre
RandomParam2 Good stuff
MoreParam and more
ResultsParam 2
Sharedparam Hey
Antoher what
RandomParam2 do you
MoreParam think
ResultsParam 2
Update #2: to get the values of the first <Table1> and the second <Table1> XML node next to one another, you need to do two calls to .nodes() - once retrieving the first node, the other time the second one. It gets a bit hairy, especially if you want to extend that even further - and performance is going to be abysmal - but it works :-)
SELECT
TBL.SParam.value('local-name(.)[1]', 'varchar(50)') 'Attribute',
TBL.SParam.value('(.)[1]', 'varchar(50)') 'Value 1',
TBL2.SParam2.value('(.)[1]', 'varchar(50)') 'Value 2'
FROM
#xmldoc.nodes('/NewDataSet/Table1[1]/*') AS TBL(SParam)
INNER JOIN
#xmldoc.nodes('/NewDataSet/Table1[2]/*') AS TBL2(SParam2) ON TBL.SParam.value('local-name(.)[1]', 'varchar(50)') = TBL2.SParam2.value('local-name(.)[1]', 'varchar(50)')
Gives an output of:
Attribute Value 1 Value 2
Sharedparam shared Hey
ResultsParam 2 2
RandomParam2 Good stuff do you
Antoher sahre what
MoreParam and more think

Answer 2

That's an odd layout. You expect columns Sharedparam,Antoher etc: not rows.
And if I read that right, Table1 maxOccurs="unbounded" which means an variable number of columns = not SQL which is fixed column type and number
To read each tag as a column (which are fixed and finite) you'd do this:
SELECT
x.item.value('(Sharedparam)[1]', 'varchar(100)') AS Sharedparam,
x.item.value('(Antoher)[1]', 'varchar(100)') AS Antoher,
x.item.value('(SharedRandomParam2param)[1]', 'varchar(100)') AS RandomParam2,
...
FROM
#xmlDoc.nodes('/NewDataSet/Table1') x(item)