CREATE TABLE employees AS SELECT * FROM hr.employees 

DECLARE   
   TYPE employee_aat IS TABLE OF employees.employee_id%TYPE   
                           INDEX BY PLS_INTEGER;   
   
   l_employees   employee_aat;   
BEGIN   
   l_employees (1) := 137;   
   l_employees (100) := 126;   
   l_employees (500) := 147;   
   
   DBMS_OUTPUT.PUT_LINE (l_employees(99));   
END;  

DECLARE   
   TYPE employee_aat IS TABLE OF employees.employee_id%TYPE   
                           INDEX BY PLS_INTEGER;   
   
   l_employees   employee_aat;   
BEGIN   
   l_employees (1) := 137;   
   l_employees (100) := 126;   
   l_employees (500) := 147;   
   
   FORALL l_index IN l_employees.first .. l_employees.last 
      UPDATE employees   
         SET salary = 10000   
       WHERE employee_id = l_employees (l_index);   
END;