The classic approach of storing XML data as physical disk files is unsuitable and tedious in many situations.
No wonder modern database engines are geared to store XML documents right along with the rest of the relational data.
Although this approach served well as far as data storage is concerned, it proved to be poor in terms of querying and manipulating the XML data.
This article will give you a jump start in using the XML data type of SQL server and will teach you how XML data can be manipulated with the help of new XML Data Modification Language (XML DML).
MSDN provides a complete XQuery language reference that you can refer to while you work with the method might also require a Transact-SQL data type as a second argument or a table and column alias tagged on after the arguments.
As we work through the article, you’ll see when and why these additional components are necessary. The data I added to the untyped column is nearly identical to the typed XML.
If you do not need the information of the columns data type in the query result set, try to avoid using the XMLDATA option with your FOR XML clause, because using this option adds extra overhead to your server and reduce the total SQL Server performance. This data type is used to store XML documents in table columns or Transact-SQL variables.
The XML Data type has definite uses, but the way of interrogating, retrieving, and manipulating the values of properties and attributes within XML have been so foreign to the SQL language as to be somewhat of a barrier to their use.Update XML attribute value with XQUERY in SQL Server Recently I have written article on Inserting attribute in existing XML Elements and Delete XML element.Today I am going to show how to update existing attribute value in XML elements.Fortunately, Robert Sheldon has once more managed to make the subject accessible to those of us who just need to get the job done. Based on those examples, it might seem that retrieving XML data is similar to retrieving objects configured with other data types.However, that’s true only when returning the entire XML value.[sourcecode language=”sql”] DECLARE @Dept VARCHAR(10) SELECT @Dept = ‘SVOC’ — updating attribute UPDATE Orders SET Test Details.modify(‘ replace value of ([email protected]) with sql:variable("@Dept") ‘) GO [/sourcecode] Let us now execute SELECT statement on Orders table to confirm that whether we have new valie in attribute “Dept” added inside “Test” element or not?