There are two things that I can theorize could cause this problem. 1) Oracle bug (have you logged a tar with OWS?) 2) The block sampled is below the high water mark, but does not contain any data. I don't know the exact sampling algorithm, but this seems to be the 2nd simplest explanation (bug being #1).
Daniel Fink [EMAIL PROTECTED] wrote: > Hi Gurus, > > I don't understand the SAMPLE BLOCK behavior. Why is it giving different results for > the query? > > [EMAIL PROTECTED] SQL> select * from SALGRADE sample block (1); > > GRADE LOSAL HISAL > ---------- ---------- ---------- > 2 1201 1400 > > [EMAIL PROTECTED] SQL> l > 1* select * from SALGRADE sample block (1) > [EMAIL PROTECTED] SQL> / > > no rows selected > > [EMAIL PROTECTED] SQL> > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in > the message BODY, include a line containing: UNSUB ORACLE-L > (or the name of mailing list you want to be removed from). You may > also send the HELP command for other information (like subscribing). -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Daniel W. Fink INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
