Generate list of all numbers (numbers not in use)

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Generate list of all numbers (numbers not in use)

Author

Topic

CF
Starting Member

4 Posts

Posted - 2007-02-21 : 09:05:31

I have an 'ID' column. I'm up to about ID number 40000, but not all are in use, so ID 4354 might not be in any row. I want a list of all numbers which aren't in use. I want to write something like this:

select [numbers from 0 to 40000] where <number> not in (select distinct id from mytable)

but don't know how. Any clues?

khtan
In (Som, Ni, Yak)

17689 Posts

Posted - 2007-02-21 : 09:08:38

use LEFT JOIN


select n.NUMBER
from   F_TABLE_NUMBER_RANGE(0, 40000) n left join mytable t
       on n.NUMBER = t.ID
where  t.ID is null

F_TALBE_NUMBER_RANGE can be found here http://www.sqlteam.com/forums/topic.asp?TOPIC_ID=47685

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