名为AdvantureWorks2012的Microsoft实践数据库有一个名为HumanResources.JobCandidate的表。该表有几列。其中一列是uri数据类型。这就是该列中一个单元格内的内容：
<ns:Resume xmlns:ns="http://schemas.microsoft.com/sqlserver/2004/07/adventure-works/Resume">
<ns:Name>
<ns:Name.Prefix></ns:Name.Prefix>
<ns:Name.First>Shai</ns:Name.First>
<ns:Name.Middle></ns:Name.Middle>
<ns:Name.Last>Bassli</ns:Name.Last>
<ns:Name.Suffix></ns:Name.Suffix>
</ns:Name>
<ns:Skills>
I am an experienced and versatile machinist who can operate a range of machinery personally as well as supervise the work of other machinists. I specialize in diagnostics and precision inspection, have expertise in reading blueprints, and am able to call on strong interpersonal and communication skills to guide the work of other production machinists whose work I am called upon to inspect.
My degree in mechanical engineering affords me a better theoretical understanding and mathematical background than many other candidates in the machinist trade.
</ns:Skills>
<ns:Employment>
<ns:Emp.StartDate>2000-06-01Z</ns:Emp.StartDate>
<ns:Emp.EndDate>2002-09-30Z</ns:Emp.EndDate>
<ns:Emp.OrgName>Wingtip Toys</ns:Emp.OrgName>
<ns:Emp.JobTitle>Lead Machinist</ns:Emp.JobTitle>
<ns:Emp.Responsibility> Supervised work of staff of four machinists. Coordinated all complex assembly and tooling activities, including production of tricycles and wagons.
Developed parts fabrication from sample parts, drawings and verbal orders.Worked with ISO9000 implementation.
</ns:Emp.Responsibility>
<ns:Emp.FunctionCategory>Production</ns:Emp.FunctionCategory>
<ns:Emp.IndustryCategory>Manufacturing</ns:Emp.IndustryCategory>
<ns:Emp.Location>
<ns:Location>
<ns:Loc.CountryRegion>US </ns:Loc.CountryRegion>
<ns:Loc.State>MI </ns:Loc.State>
<ns:Loc.City>Saginaw</ns:Loc.City>
</ns:Location>
</ns:Emp.Location>
</ns:Employment>
<ns:Employment>
<ns:Emp.StartDate>1996-11-15Z</ns:Emp.StartDate>
<ns:Emp.EndDate>2000-05-01Z</ns:Emp.EndDate>
<ns:Emp.OrgName>Blue Yonder Airlines</ns:Emp.OrgName>
<ns:Emp.JobTitle>Machinist</ns:Emp.JobTitle>
<ns:Emp.Responsibility>Repaired and maintained a variety of production and fabrication machine tools.
Set up and operated machines to close tolerances. Used and wrote CNC machine programs. Trained extensively in computer-aided manufacturing.
</ns:Emp.Responsibility>
<ns:Emp.FunctionCategory>Production</ns:Emp.FunctionCategory>
<ns:Emp.IndustryCategory>Manufacturing</ns:Emp.IndustryCategory>
<ns:Emp.Location>
<ns:Location>
<ns:Loc.CountryRegion>US </ns:Loc.CountryRegion>
<ns:Loc.State>IL </ns:Loc.State>
<ns:Loc.City>Chicago</ns:Loc.City>
</ns:Location>
</ns:Emp.Location>
</ns:Employment>
<ns:Employment>
<ns:Emp.StartDate>1994-06-10Z</ns:Emp.StartDate>
<ns:Emp.EndDate>1996-07-22Z</ns:Emp.EndDate>
<ns:Emp.OrgName>City Power and Light</ns:Emp.OrgName>
<ns:Emp.JobTitle>Assistant Machinist</ns:Emp.JobTitle>
<ns:Emp.Responsibility>Performed centerless grinding. Received training in manual mill and lathe machines, as well as micrometers and calipers.
Owned complete toolset.Worked extensive overtime on request. </ns:Emp.Responsibility>
<ns:Emp.FunctionCategory>Production</ns:Emp.FunctionCategory>
<ns:Emp.IndustryCategory>Manufacturing</ns:Emp.IndustryCategory>
<ns:Emp.Location>
<ns:Location>
<ns:Loc.CountryRegion>US </ns:Loc.CountryRegion>
<ns:Loc.State>IA </ns:Loc.State>
<ns:Loc.City>Des Moines</ns:Loc.City>
</ns:Location>
</ns:Emp.Location>
</ns:Employment>
<ns:Education>
<ns:Edu.Level>Bachelor</ns:Edu.Level>
<ns:Edu.StartDate>1990-09-15Z</ns:Edu.StartDate>
<ns:Edu.EndDate>1994-05-10Z</ns:Edu.EndDate>
<ns:Edu.Degree>Bachelor of Science</ns:Edu.Degree>
<ns:Edu.Major>Mechanical Engineering</ns:Edu.Major>
<ns:Edu.Minor></ns:Edu.Minor>
<ns:Edu.GPA>3.2</ns:Edu.GPA>
<ns:Edu.GPAScale>4</ns:Edu.GPAScale>
<ns:Edu.School>Midwest State University</ns:Edu.School>
<ns:Edu.Location>
<ns:Location>
<ns:Loc.CountryRegion>US </ns:Loc.CountryRegion>
<ns:Loc.State>IA </ns:Loc.State>
<ns:Loc.City>Ames</ns:Loc.City>
</ns:Location>
</ns:Edu.Location>
</ns:Education>
<ns:Address>
<ns:Addr.Type>Home</ns:Addr.Type>
<ns:Addr.Street>567 3rd Ave</ns:Addr.Street>
<ns:Addr.Location>
<ns:Location>
<ns:Loc.CountryRegion>US </ns:Loc.CountryRegion>
<ns:Loc.State>MI </ns:Loc.State>
<ns:Loc.City>Saginaw</ns:Loc.City>
</ns:Location>
</ns:Addr.Location>
<ns:Addr.PostalCode>53900</ns:Addr.PostalCode>
<ns:Addr.Telephone>
<ns:Telephone>
<ns:Tel.Type>Voice</ns:Tel.Type>
<ns:Tel.IntlCode>1</ns:Tel.IntlCode>
<ns:Tel.AreaCode>276</ns:Tel.AreaCode>
<ns:Tel.Number>555-0114</ns:Tel.Number>
</ns:Telephone>
<ns:Telephone>
<ns:Tel.Type>Fax</ns:Tel.Type>
<ns:Tel.IntlCode>1</ns:Tel.IntlCode>
<ns:Tel.AreaCode>276</ns:Tel.AreaCode>
<ns:Tel.Number>555-0132</ns:Tel.Number>
</ns:Telephone>
</ns:Addr.Telephone>
</ns:Address>
<ns:EMail>Shai@Example.com</ns:EMail>
<ns:WebSite></ns:WebSite>
</ns:Resume>
我需要在本专栏中找到所有名字和姓氏suing tsql。我只是一个初学者，所以精心解释会有很长的路要走。感谢。
答案 0 :(得分：2)
第一步，注册默认名称空间URI（这部分XML：xmlns="..."）：
WITH XMLNAMESPACES (DEFAULT 'http://schemas.microsoft.com/sqlserver/2004/07/adventure-works/Resume')
然后你可以在XML列上使用value()方法，将XQuery作为第一个参数传递，将SQL数据类型作为第二个参数传递，例如：
Resume.value('(/Resume/Name/Name.First)[1]', 'varchar(100)') AS 'First'
以上XQuery / Xpath分解：
(....)[1]：获取内部XQuery / XPath的第一个结果（....部分）。/Resume/Name/Name.First：在这种情况下，使用的XQuery / XPath只是一个简单的路径表达式，就像我们PC中的文件/文件夹路径一样。但是，这个XPath / XQuery不是在存储中表达文件/文件夹位置，而是在整个XML文档中表达XML节点位置。完整查询示例如下所示：
WITH XMLNAMESPACES (DEFAULT 'http://schemas.microsoft.com/sqlserver/2004/07/adventure-works/Resume')
select
Resume.value('(/Resume/Name/Name.First)[1]', 'varchar(100)') AS 'First',
Resume.value('(/Resume/Name/Name.Last)[1]', 'varchar(100)') AS 'Last'
from HumanResources.JobCandidate
供参考：