Re: Add a ROWCOUNT to the output of a select.
От | Harald Fuchs |
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Тема | Re: Add a ROWCOUNT to the output of a select. |
Дата | |
Msg-id | puskwli8i6.fsf@srv.protecting.net обсуждение исходный текст |
Ответ на | Add a ROWCOUNT to the output of a select. (Gavin 'Beau' Baumanis <gavinb@eclinic.com.au>) |
Ответы |
Re: Add a ROWCOUNT to the output of a select.
Re: Add a ROWCOUNT to the output of a select. |
Список | pgsql-sql |
In article <36af4bed0805131818p147bb440oa4c1944939e3b313@mail.gmail.com>, "Robins Tharakan" <tharakan@gmail.com> writes: > 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. I think a sequence is much simpler: 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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