title: Substr string function
body: <p>I want to get the string of 35 characters from starting but every word should not split.e.g.</p>
  <pre><code>select SUBSTR('monika awasthi awasthi awasthi awasthi',1,35) from dual
  
  output is :monika awasthi awasthi awasthi awas
  </code></pre>
  <p>but if my string end is in the middle of the word then output should be print till last space:e.g</p>
  <p><strong>Desired output:</strong></p>
  <pre><code>monika awasthi awasthi awasthi
  </code></pre>