| From: | KuroiNeko <evpopkov(at)carrier(dot)kiev(dot)ua> | 
|---|---|
| To: | pgsql-sql(at)postgresql(dot)org | 
| Subject: | Re: Antw: many-many mapping between unique tables | 
| Date: | 2000-10-16 15:14:27 | 
| Message-ID: | 39EB1B53.nail1L21P304T@ed.ed | 
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| Thread: | |
| Lists: | pgsql-sql | 
> > I am facing a problem in mapping between two tables containing unique
> > entries
> >
> Then you need a  third table T12 with columns x and  y, that contains one
> row for each
> mapping of a x(i) with a y(j).
 That's it.  Normalize it. Relation T12  may also require the  third field,
`direction', to specify whether  this is T1 -> T2 or T2  -> T1. In general,
it'd be much better to re-design data layout.
--
 Well I tried to be meek
  And I have tried to be mild
 But I spat like a woman
  And I sulked like a child
 I have lived behind the walls
  That have made me alone
 Striven for peace
  Which I never have known
Dire Straits, Brothers In Arms, The Man's Too Strong (Knopfler)
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