Dynamic table name - error

Question

After run (or test) of procedure
create or replace procedure tmp_select_dymanic
( AInTable IN VARCHAR2,
ACount OUT NUMBER
) as
begin
EXECUTE IMMEDIATE 'BEGIN SELECT count(*) INTO :Count FROM :InTable END;'
USING ACount, AInTable;
end tmp_select_dymanic;
error message: invalid table name.
I know the table exists and contains data. I can make SELECT in SQL (not dynamic).
What a reason for error? May be privileges in database? But i make SELECT on my own table?
How can i set dynamic table name in other way?
My Oracle Version 10g.

Answer 1

What you are asking can be done by REF_CURSOR;
look this example and try your self the rest:
CREATE OR REPLACE PROCEDURE insert_to_table_dinamic (
   table1   IN   VARCHAR2,
   table2   IN   VARCHAR2
AS
   rc         sys_refcursor;
   v_sql      VARCHAR2 (2000);
   v_deptno   NUMBER;
BEGIN
   v_sql :=
         'SELECT DEPTNO FROM '
      || table1
      || ' WHERE ROWNUM = 1 AND DEPTNO IS NOT NULL';
   OPEN rc FOR v_sql;
   LOOP
      FETCH rc
       INTO v_deptno;
      EXIT WHEN rc%NOTFOUND;
      v_sql :=
            'UPDATE '
         || table2
         || ' SET DEPTNO = '
         || v_deptno
         || ' WHERE DEPTNO IS NULL';
      EXECUTE IMMEDIATE v_sql;
   END LOOP;
EXCEPTION
   WHEN OTHERS
   THEN
      DBMS_OUTPUT.put_line (SQLCODE || SQLERRM);
END insert_to_table_dinamic;when i give DEPT , EMP as my 2 parameters above code will set the deptno in EMP table where deptno is null;
--Just a test proc.