title: What is the difference between nested array and associative array?
body: <p>There are two links
  <a href="http://docs.oracle.com/cd/E11882_01/appdev.112/e25519/composites.htm#LNPLS99981" rel="nofollow noreferrer">http://docs.oracle.com/cd/E11882_01/appdev.112/e25519/composites.htm#LNPLS99981</a> and </p>
  
  <p><a href="https://stackoverflow.com/questions/14934514/purpose-of-using-different-types-of-pl-sql-collections-in-oracle">Purpose of using different types of PL/SQL collections in Oracle</a></p>
  
  <p>by referring above two links i have two doubt</p>
  
  <p>1.Which one is correct nested table?</p>
  
  <p>2.If the oracle doc is correct what is the difference between nested table and associative array?</p>