title: Finding last index of a string in Oracle
body: <p>I need to find the last index of a string (e.g. <code>-</code>) within another string (e.g. <code>JD-EQ-0001</code> in Oracle's SQL (<em>version 8i</em>).  Is there a way to do this with <code>INSTR()</code> or another function?</p>