i want to create a sql statement for character field with index.

sele accode, billdate, billno, amt from xcash2 group by accode, billno into curs ccust order by billdate,billno

billno is a character field.

this showing billnos
1
10
11
12
13
14
15
16
17
18
19
2
20
21

but i want to see like :
1
2
3
4
5
6


warm regards,
mk.