title: oracle hierarchy query error ORA-01436: CONNECT BY loop in user data
body: <p>i have a table called <strong><em>abc</em></strong>
  columns and data are like:-</p>
  
  <pre><code>a    b    c
  ------------
  ab   1    2
  bc   2    3
  cd   3    4
  de   4    5
  </code></pre>
  
  <p>maybe there is data for cyclic like-</p>
  
  <pre><code>ef   5    1
  </code></pre>
  
  <p>i want output as:-</p>
  
  <pre><code>A   b    d
  ------------
  ab  1    5/4/3/2/1
  bc  2     5/4/3/2
  cd  3     5/4/3
  de  4      5/4
  ef  5       5
  </code></pre>
  
  <p>please help me out find a query to retrive data like this</p>