One of the most interesting new features of Oracle 11 is the new function result caching mechanism. Until now, making sure that a PL/SQL function gets executed only as many times as necessary was a black art. The new caching system makes that quite easy -- here is how it works.
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Re: Speed up (Oracle) database code with result caching
Good tips, I meet some similar funtions on oracle data wizard, but this document seem more useful, Thanks.