Jason Weiss wrote:
> Hello Sir or Madam,
>  
> As for my class project, I need to implement a function to calculate miss ratio.
> But I am having a such problem where to start.  I appreciate if you can give me any 
> advice how to do modify the codes and where to start.
> Thank you.

Jason:

See http://dev.mysql.com/doc/mysql/en/Adding_native_function.html

I also cover this subject in the last chapter of my book "MySQL Enterprise
Solutions".

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Sasha Pachev
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