在T-SQL中用于XML导出的数据透视数据

Question

I have a table in my database that looks like this:

@attribute       element       data
--------------------------------------
attribute1       element1      data1
attribute2       element2      data2

I want to output XML that looks like this:

<element1 attribute="attribute1">data1</element1>
<element2 attribute="attribute2">data2</element2>

There are about 30 attribute element names, sorry, and they're somewhat dynamic. I'm not all that practiced or knowledgeable in SQL. Is there a straightforward solution? Barring that, is there a "best-practice" solution? If I use dynamic SQL, what measures should I take to catch/prevent potential errors?

Answer 1

doesn't really form a valid xml since you're not specifying a root in your sample output but you can do something like this.

SELECT  CAST('<' + element + ' attribute="' + attribute + '">' + data + '</' + element + '>' AS XML)
FROM    Table1
FOR     XML PATH('')

Answer 2

By adding FOR XML RAW at the end of any query will produce XML close to what you are looking for. Also, you can specify element name by adding it at the end, such as FOR XML RAW ('ELEMENT_PARENT') , or a root name, FOR XML RAW ('ELEMENT_PARENT'), ROOT ('Example') .

As for as dynamic elements (or attributes before they are XML-ized) and error catching, you can employ any of standard bag of tricks offered by sql.

FWIW, I found this site that walks through several different examples with increasing complexity on ways to output XML data from a SQL script.

https://www.simple-talk.com/sql/learn-sql-server/using-the-for-xml-clause-to-return-query-results-as-xml/