更新XML类型列的值

Question

I have a problem! We have an SQL Server table that has an XML type column. This column have a number of nodes and some of them have misspelled values.
I would like to write a script which updates all occurrences of this misspelling! The problem is I don't know how to do it!
Let's say that one of the nodenames in the XML column is TEST and some of these nodes have the misspelled value MISSPELLED and I want it to be modified to CORRECT after the update.
Is this possible to do and if so how?
Thanks in advance.
/Kaunda

Answer 1

You can modify XML column data by following way :

CREATE TABLE Test (C1 XML)
INSERT INTO Test 
VALUES ('<REF>
            <Person>
                <FirstName>John</FirstName>
                <LastName>Smith</LastName>
                <System>
                    <User><Systemid>System1</Systemid><Type>UserId</Type><Useridentity>Userid1</Useridentity></User>
                    <User><Systemid>System2</Systemid><Type>UserIdx</Type><Useridentity>Userid2</Useridentity></User>
                    <User><Systemid>System2</Systemid><Type>Department</Type><Useridentity>Finance</Useridentity></User>
                    <User><Systemid>System3</Systemid><Type>UserId</Type><Useridentity>Userid3</Useridentity></User>
                    <User><Systemid>System4</Systemid><Type>UserIdx</Type><Useridentity>Userid4</Useridentity></User>
                </System>
            </Person>
        </REF>
')


UPDATE [Test]
SET C1.modify('replace value of (/REF/Person/System/User/Type/text())[1] with "UserId"')
WHERE C1.value('(/REF/Person/System/User/Type/text())[1]', 'varchar(max)') LIKE '%UserIdx%'

UPDATE :

For multiple values update in column, you need to write script like below :

DECLARE @strSQL NVARCHAR(MAX)
DECLARE @Index INT
DECLARE @NodeCount INT

SET @Index = 1
SELECT @NodeCount = C1.value('count(/REF/Person/System/User/Type)', 'INT') from Test

WHILE @Index <= @NodeCount
BEGIN
    SET @strSQL = ' UPDATE [Test]
                    SET C1.modify(''replace value of (/REF/Person/System/User/Type/text())[' + CAST(@Index AS VARCHAR(10)) + '] with "UserId"'')
                    WHERE C1.value(''(/REF/Person/System/User/Type/text())[' + CAST(@Index AS VARCHAR(10)) + ']'', ''varchar(max)'') LIKE ''%UserIdx%'''

    EXEC(@strSQL)

    SET @Index = @Index + 1
END

Answer 2

<REF><Person><FirstName>John</FirstName><LastName>Smith</LastName><System><User><Systemid>System1</Systemid><Type>UserId</Type><Useridentity>Userid1</Useridentity></User><User><Systemid>System2</Systemid><Type>UserIdx</Type><Useridentity>Userid2</Useridentity></User><User><Systemid>System2</Systemid><Type>Department</Type><Useridentity>Finance</Useridentity></User><User><Systemid>System3</Systemid><Type>UserId</Type><Useridentity>Userid3</Useridentity></User><User><Systemid>System4</Systemid><Type>UserIdx</Type><Useridentity>Userid4</Useridentity></User></System></Person></REF>