Oracle trigger inserting updating deleting updating computer lab
In the absence of both the encoding declaration and the BOM, the XML entity is assumed to be encoded in UTF-8.
You exploit this structural knowledge to create virtual columns, which the database can then use with constraints.
Figure 3-1 shows a simple drag and drop operation for copying the contents of the data.
It is equivalent to the IANA registered standard UTF-8 encoding, which supports all valid XML characters.
Because operation, along with all of the non-virtual columns.
You create a virtual column based on an XML element or attribute by defining it in terms of a SQL expression that involves that element or attribute; that is, you create a function-based column. For example, if you are sure that a given source XML document is valid, you can provide an argument to the constructor that disables the type-checking that is otherwise performed.
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The format and data of XML purchase orders are well suited for Oracle XML DB storage and processing techniques because purchase orders are highly structured XML documents.