Build Xml document from SQL Query using For Xml clause - sql

Question

I'm using AdventureWorks Database and I'd like to build xml block using query with FOR XML clause
but i need to specify specific XML Schema in the result to have its datatypes and so on..
e.g. this sample query " copied "
SELECT e.EmployeeID, c.FirstName, c.MiddleName, c.LastName
FROM HumanResources.Employee e INNER JOIN Person.Contact c
ON c.ContactID = e.ContactID
WHERE c.FirstName = 'Rob'
FOR XML RAW ('Employee'), ROOT ('Employees'), ELEMENTS XSINIL, XMLSCHEMA;
gets this result
<Employees xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<xsd:schema targetNamespace="urn:schemas-microsoft-com:sql:SqlRowSet1" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:sqltypes="http://schemas.microsoft.com/sqlserver/2004/sqltypes" elementFormDefault="qualified">
<xsd:import namespace="http://schemas.microsoft.com/sqlserver/2004/sqltypes" schemaLocation="http://schemas.microsoft.com/sqlserver/2004/sqltypes/sqltypes.xsd" />
<xsd:element name="Employee">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="EmployeeID" type="sqltypes:int" nillable="1" />
<xsd:element name="FirstName" nillable="1">
<xsd:simpleType sqltypes:sqlTypeAlias="[AdventureWorks].[dbo].[Name]">
<xsd:restriction base="sqltypes:nvarchar" sqltypes:localeId="1033" sqltypes:sqlCompareOptions="IgnoreCase IgnoreKanaType IgnoreWidth" sqltypes:sqlSortId="52">
<xsd:maxLength value="50" />
</xsd:restriction>
</xsd:simpleType>
</xsd:element>
<xsd:element name="MiddleName" nillable="1">
<xsd:simpleType sqltypes:sqlTypeAlias="[AdventureWorks].[dbo].[Name]">
<xsd:restriction base="sqltypes:nvarchar" sqltypes:localeId="1033" sqltypes:sqlCompareOptions="IgnoreCase IgnoreKanaType IgnoreWidth" sqltypes:sqlSortId="52">
<xsd:maxLength value="50" />
</xsd:restriction>
</xsd:simpleType>
</xsd:element>
<xsd:element name="LastName" nillable="1">
<xsd:simpleType sqltypes:sqlTypeAlias="[AdventureWorks].[dbo].[Name]">
<xsd:restriction base="sqltypes:nvarchar" sqltypes:localeId="1033" sqltypes:sqlCompareOptions="IgnoreCase IgnoreKanaType IgnoreWidth" sqltypes:sqlSortId="52">
<xsd:maxLength value="50" />
</xsd:restriction>
</xsd:simpleType>
</xsd:element>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
</xsd:schema>
<Employee xmlns="urn:schemas-microsoft-com:sql:SqlRowSet1">
<EmployeeID>4</EmployeeID>
<FirstName>Rob</FirstName>
<MiddleName xsi:nil="true" />
<LastName>Walters</LastName>
</Employee>
<Employee xmlns="urn:schemas-microsoft-com:sql:SqlRowSet1">
<EmployeeID>168</EmployeeID>
<FirstName>Rob</FirstName>
<MiddleName>T</MiddleName>
<LastName>Caron</LastName>
</Employee>
</Employees>
i need to refer to another online schema .. is that possible ?
Thanks.

Answer 1

Since you need your query to adhere to an existing schema, I think you should take control of the generated XML yourself by using, e.g., EXPLICIT mode. You can't use the XMLSCHEMA option in this case, but it's OK since you already have your own schema.