How can I find the missing sequence number

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Hi,
i get this list from database using oracle query..

but i want to list only missing sequence numbers .

can i do this?

ORDERNUMBER
B012020000000001
B012020000000002
B012020000000003
B012020000000005
B012020000000006
B012020000000007
B012020000000008
B012020000000009
B012020000000011
B012020000000012
B012020000000013
B012020000000015
B012020000000016
B012020000000017
B012020000000018
B012020000000019

B012020000000004
B012020000000010 
B012020000000014

What I have tried:

"SELECT DISTINCT(ORDERNUMBER) FROM TABLE1 ORDER BY ORDER BY ORDERNUMBER"

Posted 10-Sep-20 0:50am

Member 14588284

Updated 10-Sep-20 1:02am

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OriginalGriff · Answer 1 · 2020-09-10T01:03:00

Solution 1

The first thing to try is Google: oracle list only missing sequence numbers - Google Search[^]
Follow a few links there, and you'll find a number of ways.

Posted 10-Sep-20 1:03am

OriginalGriff

Comments

Member 14588284 10-Sep-20 10:31am

Yes i write GOOGLE for this question but i didn't find any question like my question ,
generally for series number like 1-2-3-4-5-6

OriginalGriff 10-Sep-20 10:35am

It's the same thing: just you need to look at how you generate and use your sequence.
Have a look at the other solutions, and learn how they work. Then apply that to your specific database.

Member 14588284 10-Sep-20 10:41am

But i tried :(

query = "SELECT min_sno - 1 + level missing_number FROM (SELECT MIN(ORDERNUMBER) min_sno, MAX(ORDERNUMBER) max_sno TABLE1 ) CONNECT BY level <= max_sno - min_sno + 1 minus SELECT ORDERNUMBER FROM TABLE1 "