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Andréa Moriggi

Andréa Moriggi

Oracle XMLTable

This article looks about the theme XMLTABLE around the following specifications : filtering rows with XPath, tag, attribute, nested table, variable with XML.  How XMLTABLE operator works in Oracle?  XMLTABLE operator create a map as result for given XQuery command, the map created shows the relation between rows and columns. The…

Pivot and Unpivot

This article shows how to use the PIVOT and UNPIVOT operators in Oracle 11g database, the keyword was introduced in that Oracle version. Before that you can get it by DECODE or CASE functions .   UNPIVOT operator  That operator transforms the data arranged on a column into separate rows.    With this utility it is possible to convert…