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Message Posted: Tue, 13 Oct 2015 @ 19:21:00 GMT


     
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Subj:   Unique String sequence
 
From:   Anomy Anom

<-- Anonymously Posted: Tuesday, October 13, 2015 14:18 -->

Hi,

I was wondering if anyone could give me a pointer in how to resolve this SQL problem.

I have a text string of a fixed length and I need to know when subsequent characters in the string change and in what order.

For example,

     111122244411

would return

     1st = 1
     2nd = 2
     3rd = 4
     4th = 1

and

     11111111111

would return

     1st = 1

I was thinking of a solution where I transpose each character into a row with a corresponding sequence and then looking for the order of change using a window() function, however that would take multiple steps.

We are on Teradata V15.0.


Any suggestions appreciated.

thanks



     
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