title: Convert A Relational Schema to SQL query
body: <p>I am currently taking Database Systems course in University this is a question from one of the exercises ,given by my instructor, that I couldn't figure out. I was able to do other questions. Thanks in advance.(primary keys are in italic)</p>
  
  <p>QUESTION// 
  Consider the following relational schema.</p>
  
  <p>student(<em>sid</em>, sname, address, city, gpa)</p>
  
  <p>course(<em>cid</em>, cname, iid)</p>
  
  <p>enroll(<em>sid, cid</em>, grade)</p>
  
  <p>instructor(<em>iid</em>, iname)</p>
  
  <p>Give the corresponding SQL queries for each of the following.</p>
  
  <ul>
  <li>Find the id and name of the student with the 10th highest gpa. You can assume, for simplicity, that the gpa values are distinct.</li>
  </ul>