title: PL/SQL procedure - SQL statement ignored error
body: <p>I'm doing tutorial from website <a href="http://www.plsqltutorial.com/plsql-procedure/" rel="nofollow">http://www.plsqltutorial.com/plsql-procedure/</a>.  I have run the code on apex:</p>
  
  <pre><code>CREATE OR REPLACE PROCEDURE adjust_salary(
      in_employee IN EMPLOYEES.EMPLOYEE_ID%TYPE,
      in_percent IN NUMBER
  ) IS
  BEGIN
      UPDATE EMPLOYEES
      SET salary = salary + salary * in_percent / 100
      WHERE employee_id = in_employee_id;
  END;
  </code></pre>
  
  <p>but I got error:</p>
  
  <pre><code>Error at line 6: PL/SQL: SQL Statement ignored
  
  4. ) IS
  5. BEGIN
  6.  UPDATE EMPLOYEES
  7.  SET salary = salary + salary * in_percent / 100
  8.  WHERE employee_id = in_employee_id;
  </code></pre>
  
  <p>I have checked and table employees is there.  What is the problem and how to fix it?</p>