RE: Count(*) last 30 seconds

Unfortunately I don't have the reference in front of my right now, but I believe the optimizer has a built in way to understand a count(*) and it is just as fast or faster than count(column_name).

-----Original Message-----
Sent: Tuesday, February 11, 2003 12:55 PM To: Multiple recipients of list ORACLE-L

Interestingly enough, I haven't seen an official statement on count(*) being slower than count(<column name>).

Sunil Nookala
DBA
Dell Corp.

-----Original Message-----
Sent: Tuesday, February 11, 2003 11:09 AM To: Multiple recipients of list ORACLE-L

Hi,

1. create unique index or primary key AND update statistics of the table
2. use count(1) instead of count(*)

JP

On Tuesday 11 February 2003 17:19, you wrote:
> Hi list,
>
> I issue a select count(*) from mytable and last 30 seconds.
>
> The table has 1,466,196 records and were loaded with a batch process, so
> they are in a countinous space.
>
> I consider that time exagerated.
>
> The TBS is LMT with a Uniform size of 128 MB.
>
> The block size is 8MB, version 9.2.0.1.0 in Windows 2000.
>
> Where should I start looking ???
>
> TIA
>
> Ramon E. Estevez
> com.banilejas_at_codetel.net.do
> 809-565-3121

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