Re: help on SQL

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От Kenneth Suralta
Тема Re: help on SQL
Дата
Msg-id 408627AF.2020204@hq.ntsp.nec.co.jp
обсуждение
Ответ на Re: help on SQL  (Gergely Czuczy <phoemix@harmless.hu>)
Ответы Re: help on SQL
Re: help on SQL
Список pgsql-interfaces
hi gergely,

thanks for replying..
what i mean is supposing there is a table with the following rows:
data
-----
1
2
3
4
5
6
7

is it possible to get every other N-row in the table?
example, if N is 3.
data
-----
1
4
7

thanks,
kenneth



Gergely Czuczy wrote:
On Wed, 21 Apr 2004, Kenneth Suralta wrote:
 
hello everyone,

is it possible to get every other row in the table?
like for example:
data
-----
1
2
3
4
5
6
7   
SELECT t.fields FROM table t WHERE data NOT IN (SELECT t2.data FROM tablet2 WHERE some_whereclause);

it will select these rows which ones are not in the subquery. but you can
do it simply by getting the negate of the whereclause... 
Is it possible to have this result (interval of 3)?

result
------
1
4
7   
i don't see what you mean. please describe it. 
thanks,
kenneth

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Gergely Czuczy
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