title: How to Combine two oracle QUERY
body: <p>I have a Sub query result
  Which is</p>
  
  <pre><code>Select string_Agg(amount) from(select amount from Audit_comp where auditreqid=id)
  </code></pre>
  
  <p>it returns 300,500,700</p>
  
  <p>and i need some all these using</p>
  
  <pre><code>select sum(amount) from(select amount from Audit_comp where auditreqid=id)
  </code></pre>
  
  <p>it returns 1500
  but my requirement is i need a below result in a single cell</p>
  
  <p>300+500+700=1500</p>
  
  <p>Please Suggest me</p>