title: Copy data from nested array to associative table
body: <p>I have a collection with type nested table and having millions of records</p>
  
  <p>I want to copy data from this table to another. How do we frame the INSERT clause for this seems challenging:</p>
  
  <p>Second table in which I want to insert is associative array.</p>
  
  <p>I don't have enough information with me but it would be really helpful if you show me how copy data from one collection type to another.</p>