Message-Id: <10589.114485@fatcity.com> From: "Koivu, Lisa" Date: Mon, 14 Aug 2000 08:03:28 -0400 Subject: RE: Histograms - When were they last created? This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C005E7.A8574610 Content-Type: text/plain; charset="iso-8859-1" Hi again Cherie, Look at DBA_TAB_COLUMNS. It includes LAST_ANALYZED and NUM_BUCKETS, NUM_DISTINCT, LOW_VALUE, HIGH_VALUE - much more info on the histograms than USER_HISTOGRAMS. It's where to start if you want to change the number of buckets. Lisa -----Original Message----- From: Cherie_Machler@gelco.com [mailto:Cherie_Machler@gelco.com] Sent: Sunday, August 13, 2000 4:28 PM To: Multiple recipients of list ORACLE-L Subject: Histograms - When were they last created? Listers, Does the presence of a row in the user_histograms table indicate that a histogram has been created on that column/table? Is there any way to tell when a histogram was last created/recreated/refreshed? Thanks in advance, Cherie Cherie_Machler@gelco.com -- Author: INET: Cherie_Machler@gelco.com Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru@fatcity.com (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). ------_=_NextPart_001_01C005E7.A8574610 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable RE: Histograms - When were they last created?

Hi again Cherie,

Look at DBA_TAB_COLUMNS.  It includes = LAST_ANALYZED and NUM_BUCKETS, NUM_DISTINCT, LOW_VALUE, HIGH_VALUE - = much more info on the histograms than USER_HISTOGRAMS.  It's where = to start if you want to change the number of buckets.

Lisa

-----Original Message-----
From: Cherie_Machler@gelco.com [mailto:Cherie_Machler@gelco.com= ]
Sent: Sunday, August 13, 2000 4:28 PM
To: Multiple recipients of list ORACLE-L
Subject: Histograms - When were they last = created?


Listers,

Does the presence of a row in the user_histograms = table indicate that a
histogram
has been created on that column/table?

Is there any way to tell when a histogram was last = created/recreated/refreshed?

Thanks in advance,

Cherie
Cherie_Machler@gelco.com


--
Author:
  INET: Cherie_Machler@gelco.com

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