Instead, we want the Accounting node to be the first node under the Salaries node.To make this change, we will use the format insert..first: We now have one empty Accounting node at the top, and one at the bottom. We are told that we have a new employee joining the Accounting department.To allow for precise modification of XML nodes and values, the XQuery XML query language employs an extension known as the XML Data Modification Language (DML).
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In other words, only one instance of modify() may be used at the same time on the XML value.
For example, an operation that tries to update the salary amount of two different employees in the following manner will fail: UPDATE HR_XML SET Salaries.modify('replace value of (/Salaries/Marketing/Employee[@ID=("2")]/Salary/text()) with ("60000")'), Salaries.modify('replace value of (/Salaries/Marketing/Employee[@ID=("1")]/Salary/text()) with ("60000")') GO Instead, multiple updates to the same XML value must be accomplished using entirely separate UPDATE statements. We need to update the salary amount to match that of employee #2 (60600): Notice that we had to perform two separate modify() operations in order to update the salary and tier data.
The project description for project #1 has become outdated.
We need to remove the description for the time being.
If we want to designate a new project for employee ID #2, we can do the following: The newest employee now needs salary data.