| From: | "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com> |
|---|---|
| To: | BahramPSQL <bahramjomezade(dot)gis92(at)gmail(dot)com> |
| Cc: | "pgsql-sql(at)postgresql(dot)org" <pgsql-sql(at)postgresql(dot)org> |
| Subject: | Re: ERROR: column "gid" specified more than once |
| Date: | 2015-05-12 15:07:23 |
| Message-ID: | CAKFQuwbVVDDjxPve410YZiFOAOMhM8mmsfK1zcmAp7=zoRTzpw@mail.gmail.com |
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| Lists: | pgsql-sql |
On Tuesday, May 12, 2015, BahramPSQL <bahramjomezade(dot)gis92(at)gmail(dot)com> wrote:
> I want to run a spatial query from two table!
>
> CREATE TABLE "BorujerdDistCent" as
> SELECT
> *, st_distance(st_centroid("Lorestan".geometry),"Borujerd".geometry)/1000
> as DistFromCntroid
> FROM "Borujerd", "Lorestan"
> Where "Lorestan"."Shahrestan" = 'بروجرد'
> ORDER BY
> "Borujerd".abady_name ASC
>
> But i will see this error!
> ERROR: column "gid" specified more than once
> ********** Error **********
>
> ERROR: column "gid" specified more than once
> SQL state: 42701
>
>
This is not a bug. You need to rewrite the query to avoid two output
columns named "gid".
David J.
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