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4 sie 2023 · Learn how creating XML indexes on xml data type columns can benefit your application by improving query performance.
In this section we look at XML indexes in SQL Server, why they exist and how they can be used. What is an XML index? An XML index is an index type that is specifically built to handle indexing XML type columns. There are two different types of XML indexes, primary and secondary.
That nodes function returns a piece of xml that includes all the Activity node names + values (and would return any child nodes & values too if there were any). C is a column alias, in this case it breaks up the xml into 'Activity' nodes on each row of that column.
25 wrz 2012 · XML indexes were designed to complement the XML data type and have been available since SQL Server 2005. When these indexes are used properly, they can dramatically reduce execution time in queries made against XML columns. How Do XML Indexes Work? When no indexes are present, an XML field must be ‘shredded’ when the query is executed.
3 mar 2023 · The indexed path can be used either to match an XQuery expression, or to match the return type of the value() method of the xml data type. When a path to index isn't annotated, or is annotated with the XQUERY keyword, the path matches an XQuery expression. There are two variations for XQUERY-annotated node paths:
13 mar 2021 · Querying XML Data in SQL Server. There are multiple ways to query and search XML data in SQL Server and today I want to go through some examples.
3 mar 2023 · In this article. Create a secondary selective XML index. Alter a secondary selective XML index. Drop a secondary selective XML index. See also. Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance. Describes how to create a new secondary selective XML index, or alter or drop an existing secondary selective XML index.
