Introduction
As described in Chapter 12, the latest SQL standard includes a new part known as SQL/XML. This part introduces an XML datatype and facilities that provide for the composition of XML using data extracted from a relational database and, conversely, for the storage of data extracted from an XML document in a relational database. The XML datatype can be used in the same way as any other datatype, i.e. as a datatype for a column, as a variable or as a parameter for a function.
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