Jonathan M. Heinz

Guru: Reading Nested XML Using SQL

August 31, 2020 Jonathan M. Heinz

XML is a data-interchange format, not a relational database management system. For this reason, using SQL to query XML data can be challenging, as what would be stored in two relational tables are placed in one element of XML. To put it another way, detail data is nested under the header data.

I would like to share a way of using SQL to extract nested data from an XML file. I found this method useful when testing a change to a process that creates XML to be sent to customers. I can use this SQL to quickly check that the …