How to modify database contents of xml

Yes, you can modify the database content using XML. The steps include: 1. Generate an XML document with the records to be modified; 2. Open the XML document with OPENXML and create a table variable containing XML data; 3. Use UPDATE to update the records in the table variable; 4. Submit the changes to the database.

Modify database content using XML

XML (Extensible Markup Language) can be used to manipulate database content, including modifying data. Here are the steps:

1. Generate XML document

Create an XML document containing the records you want to modify. Documentation should follow the following format:

 <code class="xml"><root> <record> <column_name>value</column_name> </record> <record> <column_name>value</column_name> </record> </root></code>

2. Open an XML document using OPENXML

Open an XML document using OPENXML in a database query. This creates a table variable containing XML data:

 <code class="sql">DECLARE @xml xml = '<root><record><column_name>value</column_name></record></root>'; SELECT * FROM OPENXML(@xml, '/root/record', 2) WITH (column_name int);</code>

3. Update records

Use the UPDATE statement to update records in table variables. Specify the column to modify, the new value, and the matching conditions:

 <code class="sql">UPDATE OPENXML(@xml, '/root/record', 2) SET column_name = 'new_value' WHERE column_name = 'old_value';</code>

4. Submit changes

After the update is complete, use the COMMIT statement to submit the changes to the database:

 <code class="sql">COMMIT;</code>

Notice:

• OPENXML table variables are read-only and must be updated and committed in the same query.
• When the record element is modified, the entire record will be updated.
• You can use other parameters to specify column types and properties in OPENXML.

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