Parsing huge XML file into a database table using sql server

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Parsing huge XML file into a database table using sql server

ejikoko

SSC Veteran

Points: 249
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May 31, 2013 at 1:13 am

#98711

I tried to parse a huge xml file using sql server (OPENROWSET) into a database table, but got an error that says duplicate attributes (author). The author column varies for each article, ranging from one author to upto six authors. The columns I am really interested in are author, title and journal. Below is a snippet of the xml data. Any suggestions will be highly appreciated. Thanks in advance.
<?xml version="1.0" encoding="ISO-8859-1"?>
<!DOCTYPE dblp SYSTEM "dblp.dtd">
<dblp>
<article mdate="2002-01-03" key="persons/CoddD74">
<author>E. F. Codd</author>
<author>C. J. Date</author>
<title>Interactive Support for Non-Programmers: The Relational and Network Approaches.</title>
<journal>IBM Research Report, San Jose, California</journal>
<volume>RJ1400</volume>
<month>June</month>
<year>1974</year>
</article>
</dblp>

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Arthur Olcot SSCertifiable Points: 6564 More actions · Answer 1

Hi... Have you tried something like below.. This works fine with your example xml:

DECLARE @xml XML

SELECT @xml = CONVERT(XML, (SELECT * FROM OPENROWSET(BULK N'c:\testxml.xml', SINGLE_BLOB) AS xmldocument), 2)

SELECT t.c.value('(./text())[1]', 'varchar(30)')

FROM @xml.nodes('//author') AS T(c)

ejikoko SSC Veteran Points: 249 More actions · Answer 2

Thanks for the response, it worked, but I would like the output to be in the formatt below. All the authors of a particular article should be together in a column, separate by comma, and the title as well as the journal should occupy the next two columns. The authors of a particular article, title and journal should be just one record. Thanks in advance for your suggestions.

Author (s)

E F Cod, Patric A V Hall, Markus Tresch

Arthur Olcot SSCertifiable Points: 6564 More actions · Answer 3

I wrote a blog on something similar a while back: http://www.olcot.co.uk/sql-blogs/using-xquery-to-create-a-single-xml-node-with-comma-separated-string-from-multiple-xml-nodes

here is one of a few ways to comma separate the node author for you:

DECLARE @xml XML

SELECT @xml = CONVERT(XML, (SELECT * FROM OPENROWSET(BULK N'c:\testxml.xml', SINGLE_BLOB) AS xmldocument), 2)

SELECT t.c.query('for $x in author

return

if (not( ($x) is (author[last()])[1] )) then

concat($x/text()[1], ",")

else

string($x/text()[1])').value('.', 'varchar(200)')

, t.c.value('(title/text())[1]', 'varchar(150)') AS 'title'

, t.c.value('(journal/text())[1]', 'varchar(100)') AS 'journal'

FROM @xml.nodes('//article') AS T(c)