Json Parsing by Select Statement in Oracle

DECLARE
  l_cursor SYS_REFCURSOR;
BEGIN
  
  OPEN l_cursor FOR
    SELECT e.empno AS "employee_number",
           e.ename AS "employee_name",
           e.deptno AS "department_number"
    FROM   emp e ;
   -- WHERE  rownum <= 2;

  APEX_JSON.initialize_clob_output;

  APEX_JSON.open_object;
  APEX_JSON.write('employees', l_cursor);
  APEX_JSON.close_object;

  DBMS_OUTPUT.put_line(APEX_JSON.get_clob_output);
  APEX_JSON.free_output;
END;

Output:

{
"employees":[
{
"employee_number":7839
,"employee_name":"KING"
,"department_number":10
}
,{
"employee_number":7698
,"employee_name":"BLAKE"
,"department_number":30
}
]

}