Re: Getting a random row
| От | Michael Glaesemann |
|---|---|
| Тема | Re: Getting a random row |
| Дата | |
| Msg-id | AECB6146-75A3-419F-80F0-80289818FAAB@seespotcode.net обсуждение исходный текст |
| Ответ на | Re: Getting a random row (Grzegorz Jaśkiewicz <gryzman@gmail.com>) |
| Ответы |
Re: Getting a random row
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| Список | pgsql-performance |
On Oct 13, 2009, at 11:19 , Grzegorz Jaśkiewicz wrote: > On Tue, Oct 13, 2009 at 4:17 PM, Shaul Dar <shauldar@gmail.com> wrote: > > >> Also PG does not have a concept of an auto-increment pseudo-column >> like >> Oracle's "rownum". Any suggestions? >> > not true - it has sequences, and pseudo type serial. Rtfm!. AIUI, rownum applies numbering to output rows in a SELECT statement, rather than some actual column of the table, which is likely what the OP is getting at. http://www.oracle.com/technology/oramag/oracle/06-sep/o56asktom.html Michael Glaesemann grzm seespotcode net
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