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alphabetic sequence generation in oracle

Posted on 2008-10-15
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I need unique alphabeticals sequence generation for about 5000 in oracle, how do I do that
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Question by:reddi_mk
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7 Comments
 
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Expert Comment

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

by:reddi_mk
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.
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Author Comment

by:reddi_mk
ID: 22725454
I need this in pl/sql script.
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What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

 

Author Comment

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

declare
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);
     begin
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;
end;

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Author Comment

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

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DiscoNova earned 1000 total points
ID: 22727039
So, basically you're looking for a Base10 to Base26 conversion function?

http://www.orafaq.com/forum/t/96699/2/ offers a few possible solutions.
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LVL 7

Expert Comment

by:DiscoNova
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.
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What is SQL Server and how does it work?

The purpose of this paper is to provide you background on SQL Server. It’s your self-study guide for learning fundamentals. It includes both the history of SQL and its technical basics. Concepts and definitions will form the solid foundation of your future DBA expertise.

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