Re: random rows - Mailing list pgsql-sql

From Joao Pedro M. F. Monoo
Subject Re: random rows
Date
Msg-id 001701c0ce85$b988dae0$06ffa8c0@infortrade.com.br
Whole thread Raw
In response to random rows  (Jie Liang <jliang@ipinc.com>)
List pgsql-sql
Hi!


> How I can return random N rows from my select stmt?
> like:
> e.g. what my selectee is a set of 1000 rows, I want randomly
> pickup 100 of 1000.

use the LIMIT clause

example

SELECT * FROM test_table LIMIT 100;

you can also use the OFFSET clause to skip to n row and the fetch the n
desired rows

example


SELECT * FROM test_table LIMIT 100 OFFSET 100;

this will skip to row number 100 and the fetch the next 100 rows

[]�s
---------------------------------------------
Joao Pedro M. F. Monoo
Infortrade Information Systems
#183816 Linux Registered User
Slackware 7.1 running 2.4.2 Linux Kernel





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