Solved

Generate a sequence based on Alphabetical order:

Posted on 2014-02-12
5
391 Views
Last Modified: 2014-02-16
Hi,
i have data as below

CODE

421
BD
AA
AA
CD
KK
MM

i Want to create sequence based on Alphabetical order

CODE   seq

421   1
AA    2
AA    2
BD    3
CD    4
KK    5
MM  6


Thanks
0
Comment
Question by:sam2929
  • 2
  • 2
5 Comments
 
LVL 74

Expert Comment

by:sdstuber
ID: 39855078
SELECT code, ROW_NUMBER() OVER (ORDER BY code) rn
  FROM yourdata;


or

SELECT code, ROWNUM
  FROM (SELECT code
          FROM yourdata
        ORDER BY code);
0
 
LVL 28

Assisted Solution

by:Naveen Kumar
Naveen Kumar earned 250 total points
ID: 39855100
try this :

select x.code, x.rr
from xyz y, ( select code, rownum rr
from (
select code
from xyz
group by code
order by code ) ) x
where x.code = y.code
0
 
LVL 28

Expert Comment

by:Naveen Kumar
ID: 39855105
If the queries given by sdstuber did not give you the exact output you are looking for, then my query should give the output you are looking for.  my query will give 2 for both AA code records where as the sdstuber queries will give 2 and 3 for the AA code records.

Thanks,
0
 
LVL 74

Accepted Solution

by:
sdstuber earned 250 total points
ID: 39855112
oh I didn't even notice the repeat in the results.

But that's simple enough, just change row_number to dense_rank in the first post


SELECT code, DENSE_RANK() OVER (ORDER BY code) rn
  FROM yourdata;


this way you don't need to double query your table,  it's just a sort.
0
 
LVL 32

Expert Comment

by:awking00
ID: 39857457
Can there be lowercase letters involved?
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Checking the Alert Log in AWS RDS Oracle can be a pain through their user interface.  I made a script to download the Alert Log, look for errors, and email me the trace files.  In this article I'll describe what I did and share my script.
Using SQL Scripts we can save all the SQL queries as files that we use very frequently on our database later point of time. This is one of the feature present under SQL Workshop in Oracle Application Express.
This video shows setup options and the basic steps and syntax for duplicating (cloning) a database from one instance to another. Examples are given for duplicating to the same machine and to different machines
This video shows how to Export data from an Oracle database using the Datapump Export Utility.  The corresponding Datapump Import utility is also discussed and demonstrated.

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question