Difference Ref cursor with/with out using clause

Question

Hi everyone,
When I am using dynamic sql with USING clause ,the results are not sorted in Ascending order.
DECLARE
TYPE emp_refcursor IS REF CURSOR;
emp_rc emp_refcursor;
TYPE v_emp_id IS TABLE OF number INDEX BY PLS_INTEGER;
TYPE v_last_name IS TABLE OF varchar2(50) INDEX BY binary_integer;
V_empno v_emp_id;
v_ename v_last_name;
p_deptno number := &U_DEPTNO;
v_limit number := 10;
v_ordcolumn varchar2(20) := 'employee_id';
v_stmt varchar2(1000);
BEGIN
v_stmt :=
'select employee_id,last_name from employees
where department_id = :x order by :y ';
dbms_output.put_line(v_stmt);
OPEN emp_rc FOR v_stmt USING p_deptno,v_ordcolumn;
LOOP
FETCH emp_rc BULK COLLECT INTO v_empno,v_ename LIMIT v_limit;
EXIT WHEN v_empno.count = 0;
FOR I IN v_empno.first .. v_empno.last
LOOP
dbms_output.put_line(v_empno(i)||' '||v_ename(i));
END LOOP;
END LOOP;
END;
When I use dynamic sql with out USING cluase,results are sorted in Ascending order.
DECLARE
TYPE emp_refcursor IS REF CURSOR;
emp_rc emp_refcursor;
TYPE v_emp_id IS TABLE OF number INDEX BY PLS_INTEGER;
TYPE v_last_name IS TABLE OF varchar2(50) INDEX BY binary_integer;
V_empno v_emp_id;
v_ename v_last_name;
p_deptno number := &U_DEPTNO;
v_limit number := 10;
v_ordcolumn varchar2(20) := 'employee_id';
v_stmt varchar2(1000);
BEGIN
v_stmt :=
'select employee_id,last_name from employees
where department_id = '||p_deptno ||
' order by '||v_ordcolumn;
dbms_output.put_line(v_stmt);
OPEN emp_rc FOR v_stmt;
LOOP
FETCH emp_rc BULK COLLECT INTO v_empno,v_ename LIMIT v_limit;
EXIT WHEN v_empno.count = 0;
FOR I IN v_empno.first .. v_empno.last
LOOP
dbms_output.put_line(v_empno(i)||' '||v_ename(i));
END LOOP;
END LOOP;
END;
P.S :---- department_id (used) = 50;
Please can some one explain why this is happening like this.
Thanks
Raghu
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Answer 1

Hi sundar,
I am new to oracle and learning/trying to get the same output by using differnt methods,rather than using FOR LOOP ,I tried to use ref cursor with dynamic sql.I am in a belief that ref cursor's with dynamic sql are faster than FOR LOOP,irrespective of the size of data.Can you correct me if I am wrong.
Coming back to ur reply,how should my statement look like,when using ref cursor
with USING claus to sort data by asc/desc order.
Thanks in advance
Raghu