SQL & PL/SQL

Hi,

I am trying to remove a chunk of a string after a third pattern match:

Here is an example:

Original string: /x-x-x-x/home1/home/M

trying to achieve: /x-x-x-x/home1

Basically I am trying to remove everything after the third occurrence of '/'...

Here is part of my first attempt..

when regexp_replace (filepath. '/',1) > 2

then  regexp_replace(filepath, '/', '',1,3)

This just replaces one character... Is there away to wildcard and remove using regexp_replace?

Thanks for the help in advance.

-Abe