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From:Mogens Melander Date:July 2 2007 7:44pm
Subject:Re: database structure
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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
+45 40 85 71 38
+66 870 133 224



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Thread
database structureHiep Nguyen2 Jul
RE: database structureRajesh Mehrotra2 Jul
  • Re: database structureBorokov Smith2 Jul
    • Re: database structureHiep Nguyen2 Jul
      • Re: database structureChristophe Gregoir2 Jul
        • Re: database structureHiep Nguyen2 Jul
          • Re: database structureMogens Melander2 Jul
            • RE: database structureHiep Nguyen3 Jul
              • Re: database structureBorokov Smith3 Jul
  • RE: database structureHiep Nguyen2 Jul