RE: [SQL] OUTER JOINS

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От Michael J Davis
Тема RE: [SQL] OUTER JOINS
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Msg-id 93C04F1F5173D211A27900105AA8FCFC1453D8@lambic.prevuenet.com
обсуждение исходный текст
Ответ на [SQL] OUTER JOINS  (Dan Janowski <danj@3skel.com>)
Список pgsql-sql
*= and =* are Oracle syntax for outer joins.

> -----Original Message-----
> From:    Dan Janowski [SMTP:danj@3skel.com]
> Sent:    Monday, April 19, 1999 7:27 AM
> To:    J_Shevland@TurnAround.com.au
> Cc:    pgsql-sql@postgreSQL.org
> Subject:    Re: [SQL] OUTER JOINS
> 
> Thanks for giving it a stab. Looking at the available
> operators,
> there is no =* or *= ops available. Although I am curious
> where it
> comes from.
> 
> Dan
> 
> 
> Joe Shevland wrote:
> > ... 
> > select t1.value from table_one t1, table_two t2 where t1.key = t2.key;
> > 
> > So this would be a straight LEFT join in my understanding. Now, I'm
> > venturing beyond my experience with PostgreSQL here, but you may be able
> > to use the associated SQL syntaxes:
> > 
> > select ... where t1.key *= t2.key
> > select ... where t1.key =* t2.key
> > ...
> >
> > Dan Janowski wrote:
> > >
> > > I've looked through the docs and mail lists but I am coming
> > > up short on references for LEFT/RIGHT/FULL OUTER JOIN
> > > avalability
> > > or functional workarounds. It seems that PostgreSQL does
> > > not have it.
> > >
> > > Any recommendations on how to aproximate the functionality?
> > >
> > > As a curiosity, is there a problem with supporting these
> > > OUTER joins or is it merely on the list?
> > >
> 
> --
> Dan Janowski     danj@3skel.com       Triskelion Systems,
> Inc.     Bronx, NY


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