title: I want to find out the number between 3 and 4 Identifier like # or @ in given String
body: <p>I Have a Unique key column like</p>
  <pre><code>ABCDRF#72665523975#1769#00177#001#2779#NA#Pyddfdfdfd#CAOHGHGHG
  </code></pre>
  <p>in which  we have composite few columns and we separated by #.<br />
  From this composite key I want to find out the number between <code>3</code> and <code>4</code> separate</p>
  <p>I have used substring with charindex-string-functions-in-sql-queries,
  but not able to find out  the expected results.</p>
  <p>I want to find out <code>00177</code> from above</p>