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Message Posted: Thu, 06 Dec 2012 @ 13:21:35 GMT


     
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Subj:   Re: Selecting a part of a table
 
From:   Gregg, William

Hi James - use the SAMPLE function to generate a random sample of a fixed number of rows or a percentage of the rows.

1) Fixed Nbr:

     Select *
     From dbnm01.tblnm01
     Sample 100000    --Selects 100000 rows from the answerset ;

2) Percentage

     Select *
     From dbnm01.tblnm01
     Sample .10            --Express the percentage as a decimal ;

Since the result set is randomly selected, U are unable (well actually, almost never able) to duplicate the answer set by rerunning the query.


Rgrds,

Bill Gregg



     
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