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what does sample means?

From: Á¤¿µ¼® <illudus2_at_kornet.net>
Date: Mon, 18 Jun 2001 14:06:31 +0900
Message-ID: <9gk22h$8bi$1@imsinews.kornet.net> 






select * from tableA sample (20)





In this sql, what does sample(20) and what sample means?



Thanks in advance,
Received on Mon Jun 18 2001 - 00:06:31 CDT












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