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Home -> Community -> Mailing Lists -> Oracle-L -> Re: Counting number of rows
if the table is analyzed just go to dba_Tables.num_rows
bitmap indexes are very fast on counts.
----- Original Message -----
From: "Mladen Gogala" <mladen_at_wangtrading.com>
To: <oracle-l_at_freelists.org>
Sent: Tuesday, February 17, 2004 4:15 PM
Subject: Re: Counting number of rows
> The function below would count rows extremely quickly, and is
> independent of the table size. Even better, it is completely accurate
> and doesn't rely on the underlying statistics. The table
> in question may not even be analyzed. It does have one minor
> shortcoming, however.
>
> <PRANK>
> create or replace
> function count_rows(tbl in varchar2) return number deterministic
> as
> TRUNC VARCHAR2(128):='truncate table '||tbl;
> begin
> execute immediate trunc;
> return(0);
> end;
> /
> </PRANK>
> On 02/17/2004 03:27:31 PM, "Potluri, Venu (CT Appl Suppt)" wrote:
> > Is there a quick way to count number of rows in a table? Don't want
> > to
> > do select count(*) from..... on a table (such as GL_BALANCES) with
> > more than 250 million rows.
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-- Archives are at http://www.freelists.org/archives/oracle-l/ FAQ is at http://www.freelists.org/help/fom-serve/cache/1.html -----------------------------------------------------------------Received on Tue Feb 17 2004 - 15:41:17 CST
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