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  3. June 2009

RE: Looking for gaps in a key sequence

From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of James H. H. Lampert
Sent: Wednesday, June 24, 2009 11:27 AM
To: Midrange Systems Technical Discussion
Subject: Looking for gaps in a key sequence

Given a key sequence in a file, really just a series of numbers, does
anybody know of an algorithm, other than brute force, for finding gaps
in the sequence?

Here's an SQL solution:

SELECT A.myseq
FROM mytable A
WHERE myseq NOT IN (
SELECT myseq+1
FROM mytable
)

Hope that helps.
Dennis


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