Re: Select into

On Thu, Mar 20, 2008 at 5:40 PM, Joe <dev(at)freedomcircle(dot)net> wrote:

> Gavin 'Beau' Baumanis wrote:
> >
> > The copy is inside the same table, so I don't understand why it (the
> > required query ) would require any joins.
> >
> > Ie. I want to copy the contents of a row (but for the id column - of
> > course) into a record in the same table.
>
> I think what you want is something like this:
>
> Given (col1 being the id or PK):
>
> col1 | col2 | col3
> ------+------+---------------
> 1 | 123 | first record
> 2 | 456 | second record
> 3 | 789 | third record
>
> then
>
> update t1 set col2 = t1copy.col2, col3 = t1copy.col3
> from t1 as t1copy
> where t1.col1 = 1 and t1copy.col1 = 3;
>
> will result in:
>
> col1 | col2 | col3
> ------+------+---------------
> 1 | 789 | third record
> 2 | 456 | second record
> 3 | 789 | third record
>
> So, it is a join ... of a table with a virtual copy of itself.
>

Except that it doesn't work... Did you try to execute that query; I am
assuming not.

Best regards,

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