Re: database structure

[Mogens Melander]

On Mon, July 2, 2007 21:10, Hiep Nguyen wrote:
>
> take your advice, i looked in to JOIN and i got the idea.  but i noticed
> that in order to use JOIN, don't you need to have the same column name in
> both tables?  i just don't see it in your example here.  is there
> something that i'm missing?

Using the form:

select t1.field1 data1, t2.field1 data2, t3.fieldn data3
from table_a t1
left join table_b t2 on ( t1.id=t2.t1_ref )
left join table_n t3 on ( t2.id=t3.t2_ref );

You can join on allmost anything.

?? Can typecasts be used in this scenario ??

>
> can u give a select example with JOIN on three tables above?

-- 
Later

Mogens Melander
[phone]
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