title: How to replace first three characters of a string in oracle
body: <p>How to replace first three characters of a string in oracle. Lets say i have 100 records of employee id, i need to replace first three characters of records between 30 to 50 out of 100.</p>
  
  <ul>
  <li>Input:111234,111235,111236,111237</li>
  <li>Output: 222234,222235,222236,222237 (Replace and update)</li>
  </ul>