Updating xml column sql server
You need only specify the database object, the method name, and an XQuery expression, as shown in the following syntax: You’ll notice that the XQuery expression is entirely enclosed in single quotes and those are enclosed in parentheses.The trick with any XML method is to get the XQuery expression right.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.The untyped XML doesn’t include the namespace information, of course.Although the preceding example is helpful in demonstrating the basics of using the method, it’s not much use beyond that because you can just as easily retrieve all the column contents simply by specifying the column name.However, in the following example, I get more specific by limiting the results to the If you want to return a specific element and its child elements, you can do so by referencing one of its attributes.For example, suppose you want to include only products from the Bikes category.
You can also retrieve an attribute value, rather than an element value, by specifying the name of the attribute in your element path.To better understand how this works, let’s look at an example that uses the list itself is the same as the preceding example, so this statement returns the same results as that example.The methods we’ve looked at up to this point have been concerned only with reading data in an XML document, but the element to any other location within the document, I would have received a violation error.As the following syntax illustrates, when you call the For the untyped column, the XQuery expression includes the element path as you saw in earlier examples.
However, after the path, you must add an integer in brackets that indicates which element of that name you should retrieve.
But at its simplest, the expression must define the path of the element you want to retrieve.