Trouble with Between operator and Order by clausule

Question

Hello, can somebody help me?
I have this setup:
create table test (cod varchar2(10));
insert into test (cod) values ('1');
insert into test (cod) values ('2');
insert into test (cod) values ('3');
insert into test (cod) values ('4');
insert into test (cod) values ('5');
insert into test (cod) values ('49');
insert into test (cod) values ('CN0047');
commit
Then this query:
SQL> select * from test order by 1;
COD
CN0047
1
2
3
4
49
5
7 filas seleccionadas.
SQL> select * from test order by 1 desc;
COD
5
49
4
3
2
1
CN0047
7 filas seleccionadas.
SQL> select * from test where cod between 'CN0047' AND '49';
no row selected
SQL> select * from test where cod between '49' AND 'CN0047';
COD
5
49
CN0047
Why Between operator works different than Order by?
This query: select * from test where cod between 'CN0047' AND '49';
Shouldn't return CN0047, 1, 2, 3, 4 and 49?
Thanks in advance.
Joel Orta

Answer 1

This may help;
SQL> --
SQL> -- ******************** NLS SORT ********************
SQL> --  
SQL> select * from v$nls_parameters where parameter = 'NLS_SORT'
parameter            value              
NLS_SORT             BINARY             
1 row selected.
SQL> select * from test order by 1
COD      
1        
2        
3        
4        
49       
5        
CN0047   
7 rows selected.
SQL> alter session set NLS_SORT = FRENCH
Session altered.
SQL> select * from v$nls_parameters where parameter = 'NLS_SORT'
parameter            value              
NLS_SORT             FRENCH             
1 row selected.
SQL> select * from test order by 1
COD      
CN0047   
1        
2        
3        
4        
49       
5        
7 rows selected.
SQL> --
SQL> -- ******************** NLS COMP ********************
SQL> --
SQL> select * from v$nls_parameters where parameter = 'NLS_COMP'
parameter            value              
NLS_COMP             BINARY             
1 row selected.
SQL> select * from test where cod between '49' AND 'CN0047'
COD      
5        
49       
CN0047   
3 rows selected.
SQL> alter session set NLS_COMP = ansi
Session altered.
SQL> select * from v$nls_parameters where parameter = 'NLS_COMP'
parameter            value              
NLS_COMP             ANSI               
1 row selected.
SQL> select * from test where cod between '49' AND 'CN0047'
no rows selected