How to Join OPENXML data to my Inner Join Query?

问题

OpenXML:

DECLARE @idoc int
DECLARE @doc varchar(1000)
SET @doc =
'<ROOT>
        <Employee EmployeeID = "1"  EmpStatus = "Full Time"/>
        <Employee EmployeeID = "2"  EmpStatus ="Part Time" />
        </ROOT>'
    EXEC sp_xml_preparedocument @idoc OUTPUT, @doc
SELECT    *
FROM       OPENXML (@idoc, '/ROOT/Employee',1)
            WITH (EmployeeID  varchar(10),
                  EmpStatus varchar(20))

Results:

EmployeeID    EmpStatus
    1         Full Time
    2         Part Time

Table query:

    SELECT hr.EmployeeID, hr.Title, c.FirstName,c.LastName 
    FROM HumanResources.Employee hr WITH (NOLOCK)
    INNER JOIN ContactInfo c WITH (NOLOCK)
    ON hr.ContactID = c.ContactID
    Where hr. EmployeeID IN ( 1, 2)

Results:

EmployeeID  Title         FirstName  LastName
    1   Engineering   Mike       Brown
    2   Programmer    Yves       Anthony

How to join OpenXML data to my inner join query using EmployeeID?

回答1:

Do you insist on using OpenXML? It's old, it's legacy - using the native XQuery functions typically is much easier.

Try something like this:

DECLARE @Employees TABLE (EmployeeID INT, Title VARCHAR(20), FirstName VARCHAR(20),LastName VARCHAR(20))

INSERT INTO @Employees VALUES(1, 'Engineering', 'Mike', 'Brown')
INSERT INTO @Employees VALUES(2, 'Programmer', 'Yves', 'Anthony')

DECLARE @doc XML 
SET @doc = '<ROOT>
              <Employee EmployeeID = "1"  EmpStatus = "Full Time"/>
              <Employee EmployeeID = "2"  EmpStatus ="Part Time" />
            </ROOT>'

;WITH XmlCTE AS
(
    SELECT
        EmpID = Empl.value('@EmployeeID', 'int'),
        EmpStatus = Empl.value('@EmpStatus', 'varchar(10)')
    FROM @doc.nodes('/ROOT/Employee') AS Tbl(Empl)
)
SELECT 
    e.*, x.EmpStatus 
FROM 
    @Employees e
INNER JOIN  
    xmlcte x ON e.EmployeeID = x.EmpID

This gives me an output of:

回答2:

Despite the other answer implying a level of deprecation in openxml that I can find no evidence of, and not bothering to address how to do it anyway... you can use openxml and join at the same time.

In your case, it'd be something like this:

select
    x.*,
    hr.EmployeeID, hr.Title, c.FirstName, c.LastName 
from
    openxml (@IDoc, '/ROOT/Employee',1)
    with (
        EmployeeID  varchar(10),
        EmpStatus   varchar(20)
    ) as x
    inner join HumanResources.Employee hr with (nolock) on
        x.EmployeeID = hr.EmployeeID
    inner join Contactinfo c with (nolock)
        on hr.ContactID = c.ContactID;

h/t: http://www.informit.com/articles/article.aspx?p=26499&seqNum=3

来源：https://stackoverflow.com/questions/12827126/how-to-join-openxml-data-to-my-inner-join-query

标签

sql-server-2008

openxml