SQL>
SQL> create or replace
2 procedure swap( p_parm1 in out number, p_parm2 in out number ) as
3 --
4 l_temp number;
5 begin
6 l_temp := p_parm1;
7 p_parm1 := p_parm2;
8 p_parm2 := l_temp;
9 end swap;
10 /
SQL>
SQL>
SQL>