title: trunc and round function in sql
body: <p>Is trunc and round the same with negative arguments?</p>
  
  <pre><code>       SQL&gt; select round(123456.76,-4) from dual;
  
          ROUND(123456.76,-4)
           -------------------
           120000
  
           SQL&gt; select trunc(123456.76,-4) from dual;
  
            TRUNC(123456.76,-4)
            -------------------
           120000
  </code></pre>