Hi everyone
I don't know if this is a case of DEJA VU ALL OVER AGAIN, but this
conversation seems all so familiar
So much so that in the solution that Dennis has presented will only work to
a certain extent
For example
1
2
7
8
9
For the above table, using the solution from Dennis should give the
following results (I think)
3
10
Alan Shore
Programmer/Analyst, Distribution
E:AShore@xxxxxxxxxxx
P:(631) 200-5019
C:(631) 880-8640
"If you're going through Hell, keep going" - Winston Churchill
"Dennis Lovelady"
<iseries@lovelady
.com> To
Sent by: "'Midrange Systems Technical
midrange-l-bounce Discussion'"
s@xxxxxxxxxxxx <midrange-l@xxxxxxxxxxxx>
cc
06/24/2009 12:17 Subject
PM RE: Looking for gaps in a key
sequence
Please respond to
Midrange Systems
Technical
Discussion
<midrange-l@midra
nge.com>
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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