select query char numeric id to order by desc

Question

I have example data

SMMP022011304196
SMMP022011304199    
SMMP022011304197    
SMMP022011304193
SMMP022011304195    
SMMP022011304198    
SMMP022011304192    
SMMP0220113041910   
SMMP022011304191
SMMP022011304194

If I use SELECT myfield from mytable order by myfield DESC I got result like this

SMMP022011304199    
SMMP022011304198    
SMMP022011304197    
SMMP022011304196    
SMMP022011304195    
SMMP022011304194    
SMMP022011304193    
SMMP022011304192    
SMMP0220113041910   
SMMP022011304191

Please help to make result like this :

SMMP0220113041910   
SMMP022011304199    
SMMP022011304198    
SMMP022011304197    
SMMP022011304196    
SMMP022011304195    
SMMP022011304194    
SMMP022011304193    
SMMP022011304192    
SMMP022011304191

Answer 1

Just sort by LENGTH of field and then for values with equal length:

SELECT myfield from mytable order by 
LENGTH(myfield) DESC,
myfield DESC

SQLFiddle demo

Answer 2

If the data always have SMMP in front, you could use below:

ORDER BY LPAD(REPLACE(myfield,'SMMP',''),15,'0') desc;

The logic for this method is to ignore the 4 char in front and only sort the numeric figure behind.

Answer 3

Following my earlier comment, sort as follows:-

SELECT myfield
FROM mytable
ORDER BY SUBSTRING(myfield, 1, 4) DESC, cast(SUBSTRING(myfield, 5) AS unsigned) DESC

Note this only works if your field is of a fixed format with 4 characters followed by numerics

Answer 4

This is working fine. Below code is work for SQL Server 2008 R2 :

SELECT 
   myfield  
FROM mytable 
ORDER BY 
    LEN(myfield) DESC 
    ,myfield DESC