[postgis-users] More newbie' questions

[Tim Robertson]

Hi

 

Perhaps something like this might help?

 

update b inner join p on p.numerodist=b.numerodist and and
p.numerosecc=b.numerosecc set b.areaB = p.areaP

 

?

 

 

 

 

  _____  

From: postgis-users-bounces at postgis.refractions.net
[mailto:postgis-users-bounces at postgis.refractions.net] On Behalf Of Gustavo
Ces
Sent: Tuesday, April 10, 2007 10:21 AM
To: PostGIS Users Discussion
Subject: [postgis-users] More newbie' questions

 

Hi all,

 

    I´m trying to insert a column data ( double precision) from table p into
another column b with two common columns( numerodist and numerosecc):

 

update b  set areaB=(select p.areaP from p, b where
p.numerodist=b.numerodist 
and p.numerosecc=b.numerosecc);

 

but this way i can´t because the result is a lot of rows, not a single one.
How can i update my p table with the value of just one row of the first one?
I know this is a sql question but i read the postgres reference and don´t
know how to solve this.

Thanks in advance,

 

Galois

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