How can XML tag names be made dynamic for the SQL output?

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There are a few ways to make XML tag names dynamic for SQL output, including:

1. Using variables: Use variables in the XML tag names to make them dynamic. For example, instead of hardcoding the tag name as <firstname>, use the variable @FirstName as the tag name.

SELECT @FirstName AS [FirstName], @LastName AS [LastName], @Email AS [Email] FROM Users FOR XML PATH('User')

1. Using CONCAT function: Use the CONCAT function to create the XML tag names dynamically. For example, CONCAT('Field', FieldID) could be used to create dynamically numbered tag names.

SELECT CONCAT('Field', FieldID) AS [Field], Value AS [Value] FROM Table FOR XML PATH('Row')

1. Using XML RAW Mode: Use the XML RAW mode to generate XML output with dynamic tag names without using FOR XML PATH() clause.

SELECT FirstName as FN, LastName as LN, Email as Eml FROM Users FOR XML RAW('User'), ROOT('Users')

These are just a few examples, and the approach will depend on your specific needs and the database management system being used.