alphabetic sequence generation in oracle

Posted on 2008-10-15
Last Modified: 2013-12-07
I need unique alphabeticals sequence generation for about 5000 in oracle, how do I do that
Question by:reddi_mk
  • 4
  • 2
LVL 142

Expert Comment

by:Guy Hengel [angelIII / a3]
ID: 22725269
could you please clarify the request?

Author Comment

ID: 22725431
I need to generate unique alphabeticals like A B C...Z , AA AB AB...AZ, BA,BB,BC...BZ  up to 5 characters
Could you please send me the script for this.

Author Comment

ID: 22725454
I need this in pl/sql script.
PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.


Author Comment

ID: 22725746
i had following script can somebody tweak it.


v_Current_Number number;

v_Current_Mod_Value number;

v_Current_Quot_Value number;

v_third_char varchar2(200);

v_second_char varchar2(200);

v_first_char varchar2(200);

v_Final_String varchar2(200);


select CINXFER.Testseq.nextval into v_Current_Number from dual;

v_Current_Mod_Value := mod(v_Current_Number, 26);

v_Current_Quot_Value := trunc(v_Current_Number/26);

select chr(64+ decode(v_Current_Mod_Value, 0, 26, v_Current_Mod_Value)) into v_third_char from dual;

dbms_output.put_line('third_char '||v_third_char);

select decode(v_Current_Quot_Value, 0, NULL,chr(64+ decode(mod(v_Current_Quot_Value, 26), 0, 26, mod(v_Current_Quot_Value, 26)))) into v_second_char from dual;

select decode(trunc(v_Current_Number/(26*26)), 0, NULL, chr(64+ decode(mod(trunc(v_Current_Number/(26*26)), 26), 0, 26, mod(trunc(v_Current_Number/(26*26)), 26)))) into v_first_char from dual;

v_Final_String := v_first_char||v_second_char||v_third_char;


Open in new window


Author Comment

ID: 22725963
Can somebody help me I need to get this done by end of today.

Accepted Solution

DiscoNova earned 250 total points
ID: 22727039
So, basically you're looking for a Base10 to Base26 conversion function? offers a few possible solutions.

Expert Comment

ID: 22733823
i strongly object the fact that users have, during the last couple of months, started to abuse EE's "request removal"-option instead of awarding points to the people responding to their questions.

The page I linked to gives not only one, but a multitude of distinct possibilities of solving the problem. All the author needed to do is choose the one that suits him best.

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Bulk insert into global temporary table 2 63
Oracle Syntax 8 56
Query to identify changes between rows of two tables 8 37
Shredding xml into an oracle 11g Database 2 27
Have you ever had to make fundamental changes to a table in Oracle, but haven't been able to get any downtime?  I'm talking things like: * Dropping columns * Shrinking allocated space * Removing chained blocks and restoring the PCTFREE * Re-or…
Configuring and using Oracle Database Gateway for ODBC Introduction First, a brief summary of what a Database Gateway is.  A Gateway is a set of driver agents and configurations that allow an Oracle database to communicate with other platforms…
This video shows how to set up a shell script to accept a positional parameter when called, pass that to a SQL script, accept the output from the statement back and then manipulate it in the Shell.
Via a live example, show how to restore a database from backup after a simulated disk failure using RMAN.

920 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

Need Help in Real-Time?

Connect with top rated Experts

12 Experts available now in Live!

Get 1:1 Help Now