title: ORA-01731: circular view definition encountered
body: <p>we are migrating over to oracle from sql server side. </p>
  
  <p>on sqlserver we used to have a view like the following</p>
  
  <pre><code>create view blah
  AS 
  Select column1, 
         column2
   FROM  blah;
  </code></pre>
  
  <p>but doing this on oracle produces circular view error. </p>
  
  <p>is this not allowed on oracle side?</p>