SQL>
SQL>
SQL>
SQL> declare
2 type charListType is table of number index by varchar2(100);
3 vc charListType;
4 type numberListType is table of number index by binary_integer;
5 n numberListType;
6 t number;
7 begin
8 t := dbms_utility.get_time;
9 for i in 1 .. 1000 loop
10 n(i) := i;
11 end loop;
12 dbms_output.put_line('Index by Number : '|| (dbms_utility.get_time-t));
13 t := dbms_utility.get_time;
14 for i in 1 .. 1000 loop
15 vc(i) := i;
16 end loop;
17 dbms_output.put_line('Index by Varchar2: '|| (dbms_utility.get_time-t));
18 end;
19 /
Index by Number : 0
Index by Varchar2: 0
PL/SQL procedure successfully completed.
SQL>