"Juan Guillermo Fernández V." <promodeus_at_hotmail.com> wrote in message
news:bbu5pa$k65$1_at_news1.nivel5.cl...
> Hi everybody.
>
> I've been working for a just a while now with Oracle (or with any DB for
> that matter. I'm really new to all this), and I've encountered a problem I
> can't find a solution to.
>
> I've created a table... let's call it "STUDENTS". It has a Primary Key
field
> (St_ID) and a bunch of other fields. It also has a Foreign Key (Tut_ID),
an
> dientification for his Tutor, a reference to the TUTORS table. The thing
is,
> a student MAY or MAY NOT have a tutor, so the Foreign Key field Tutor MAY
or
> MAY NOT have data; id est, it May have an ID number, or else it will be
> NULL.
>
> Now, here's where I'm having the problem. When I do a simple:
>
> SELECT * FROM STUDENTS,TUTORS
> WHERE STUDENTS.Tut_ID=TUTORS.Tut_ID;
>
> it shows me only those rows WITH something on the Tut_ID field... and I
was
> hoping (and need) to list every row ond STUDENTS, adding the Tutor data
when
> it's present, ommiting it (empty fields) when is not...
>
> Maybe there is an obvious way to do this, just a simple instruction... but
> I'm reourceless on this.
>
> Pleasy. Any help would be enourmosly appreciated. thanks!
>
> PS: Sorry for my english, if it tourns out inintelligible or horrible
> misspelled.
left join, look that up in your documentation
Received on Sat Jun 07 2003 - 21:12:27 CDT
