Re: Add a ROWCOUNT to the output of a select.
От | Robins Tharakan |
---|---|
Тема | Re: Add a ROWCOUNT to the output of a select. |
Дата | |
Msg-id | 36af4bed0805140301i3360c9fbw1a5238dc283161f9@mail.gmail.com обсуждение исходный текст |
Ответ на | Re: Add a ROWCOUNT to the output of a select. (Harald Fuchs <hari.fuchs@googlemail.com>) |
Список | pgsql-sql |
Oops!
Of course, I meant a sequence.
Robins
Of course, I meant a sequence.
Robins
On Wed, May 14, 2008 at 2:10 PM, Harald Fuchs <hari.fuchs@googlemail.com> wrote:
In article <36af4bed0805131818p147bb440oa4c1944939e3b313@mail.gmail.com>,"Robins Tharakan" <tharakan@gmail.com> writes:I think a sequence is much simpler:
> While we could always check for the query performance reasons, I
> rather think that this is an overkill for the purpose of mere line
> numbers.
> If such queries don't change frequently, you could be better off
> using a simple function that instead adds a 'rownumber' field to the
> output of the inner SQL query. The 'rownumber' could instead be
> calculated by simply incrementing it within a FOR loop for each row.
create temp sequence tmp;
select nextval('tmp') as rownum,contactdate
from
myTable
where
contactdate > '2007-06-30 23:59:59'
order by
contactdate;--
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