Re: Oracle SQL Condition Question...

From: <mpir_at_compuserve.com>
Date: 1998/04/21
Message-ID: <6hj176$lvm$1@nnrp1.dejanews.com>#1/1

In article <6hg4p8$se0$1_at_engnews2.Eng.Sun.COM>, gosar_at_EBB.Eng.Sun.COM wrote:
>
> Hi,
>
> I have 2 tables
>
> tab1 tab2
> ==== ====
> .. ..
> .. ..
> f1 f2
> .. ..
> .. ..
>
> Both the tables above contain approx. 60,000 Records
> and have indexes on f1 and f2.
>
> I have an SQL which is the foll..
>
> Insert into tab3 ( select * from tab1 where tab1.f1 not in
> (select distinct tab2.f2 from tab2));
>
> The problem is this SQL takes around 40-45 hours to execute...
>
> Am i missing something here...Or any Workarounds Possible...??
>
> TIA,
> Bg
>
>

Consider insert int tab3
select * from tab1
where not exists (select f2 from tab2

                  where tab2.f2=tab1.f1);

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