Re: What is hash join?

read the docs. otn.oracle.com

click on search. do a search for hash join.

The docs are very good. read them.
----- Original Message -----
To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Thursday, January 15, 2004 8:34 AM

> Dear all,
>
> I understand join is for joining two tables, I know nested loops and
> sort-merge joins and I know how they work and on what situation they're
> used best at. But I really don't understand hash join, how are they
> working to join tables and on what situation they performed best? And
> based on what does Oracle use hash join for joining tables in the
> execution plan? If they use hash value, how does Oracle determine the
> hash value when performing hash join?
> I really in the dark here, please give me some light., Thank you all in
> advance.
>
> Regards,
>
> Wendry
>
>
>
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> Please see the official ORACLE-L FAQ: http://www.orafaq.net
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> Author: Wendry
> INET: wendry_yang_at_indo.net.id
>
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