Help ordering a recordset

Hello, I'm new to Oracle and SQL as well. I have a table that stores hundreds of names in the following pattern:
RMAWSTI09
RMAWSTI10
RMAWSTI100
RMAWSTI11
RMAWSTI01
RMAWNOTE01
RMAWNOTE10
RMAWNOTE11
RMAWNOTE100
I want to order those names considering only the numeric part. Can anyone assist me on how to do it? I found out that this is possible by using the regexp_replace function, but I'm having trouble to understand its syntax. Thanks in advance.
edit: using oracle 10g

Massimo Ruocchio wrote:
Or
ORDER BY TSTRING, TO_NUMBER(REGEXP_REPLACE(TSTRING,'[^0-9]+',''));if tstring for sure starts with alphabetic characters... less regex evaluation means improved performances...Have you actually tried it? It doesn't return the same results:
SQL> WITH test_data AS
2 (
3          SELECT 'RMAWSTI09' AS TSTRING FROM DUAL UNION ALL
4          SELECT 'RMAWSTI10' AS TSTRING FROM DUAL UNION ALL
5          SELECT 'RMAWSTI100' AS TSTRING FROM DUAL UNION ALL
6          SELECT 'RMAWSTI11' AS TSTRING FROM DUAL UNION ALL
7          SELECT 'RMAWSTI01' AS TSTRING FROM DUAL UNION ALL
8          SELECT 'RMAWNOTE01' AS TSTRING FROM DUAL UNION ALL
9          SELECT 'RMAWNOTE10' AS TSTRING FROM DUAL UNION ALL
10          SELECT 'RMAWNOTE11' AS TSTRING FROM DUAL UNION ALL
11          SELECT 'RMAWNOTE100' AS TSTRING FROM DUAL
12 )
13 SELECT TSTRING
14 FROM    TEST_DATA
15 ORDER BY REGEXP_REPLACE(TSTRING,'[0-9]+','')
16 ,       TO_NUMBER(REGEXP_REPLACE(TSTRING,'[^0-9]+',''));
TSTRING
RMAWNOTE01
RMAWNOTE10
RMAWNOTE11
RMAWNOTE100
RMAWSTI01
RMAWSTI09
RMAWSTI10
RMAWSTI11
RMAWSTI100
9 rows selected.
SQL> WITH test_data AS
2 (
3          SELECT 'RMAWSTI09' AS TSTRING FROM DUAL UNION ALL
4          SELECT 'RMAWSTI10' AS TSTRING FROM DUAL UNION ALL
5          SELECT 'RMAWSTI100' AS TSTRING FROM DUAL UNION ALL
6          SELECT 'RMAWSTI11' AS TSTRING FROM DUAL UNION ALL
7          SELECT 'RMAWSTI01' AS TSTRING FROM DUAL UNION ALL
8          SELECT 'RMAWNOTE01' AS TSTRING FROM DUAL UNION ALL
9          SELECT 'RMAWNOTE10' AS TSTRING FROM DUAL UNION ALL
10          SELECT 'RMAWNOTE11' AS TSTRING FROM DUAL UNION ALL
11          SELECT 'RMAWNOTE100' AS TSTRING FROM DUAL
12 )
13 SELECT TSTRING
14 FROM    TEST_DATA
15 ORDER BY TSTRING
16 ,       TO_NUMBER(REGEXP_REPLACE(TSTRING,'[^0-9]+',''));
TSTRING
RMAWNOTE01
RMAWNOTE10
RMAWNOTE100
RMAWNOTE11
RMAWSTI01
RMAWSTI09
RMAWSTI10
RMAWSTI100
RMAWSTI11
9 rows selected.100 is ordered before 11 in both cases. You need to sort only the characters then the numbers.

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