如何在DB2中生成一个字母数字序列？

Question

Is it possible to generate an alphanumeric sequence in DB2?

I want to create an alphanumeric sequence which starts from 'AA' and ends with '99', as follows:

AA...AZ, A0...A9, BA...BZ, B0...B9, ... ZA...ZZ, 
Z0...Z9, 0A...0Z,   00...09, 1A...1Z, 10...19, ...9A...9Z, 90...99

Answer 1

Here is a recursive query that iterates from 0 to 1295 and DIV & MOD functions to lookup the alpha characters:

WITH n(n,x) AS
(
SELECT 0,'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789' FROM SYSIBM.SYSDUMMY1
UNION ALL
SELECT n+1,x FROM n WHERE n<1295
)
SELECT 
    SUBSTR(x, n/36 + 1,1) || SUBSTR(x, MOD(n,36) + 1,1) 
FROM n

Answer 2

DB2 has the CREATE SEQUENCE statement to allow the creation of numeric sequences. There is functionality to obtain the current and the next value of defined sequences. Create a SQL function that, when invoked, obtains the next value from your sequence and translates it into your specific encoding.