title: How to create index?
body: <p>Here is the details:-</p>
  
  <p>Table: </p>
  
  <p><code>tableA</code></p>
  
  <p>Columns: </p>
  
  <pre><code>columnA, columnB
  </code></pre>
  
  <p>Query: </p>
  
  <pre><code>Select * from tableA where columnA = columnB
  </code></pre>
  
  <p>I would like to create index for this where clause "columnA=columnB" in Oracle database, is it possible to do that?</p>