You need to make it return just one row.
It doenst knwo which value to use in the insert.
Jason
On Tue, 11 Sep 2001, Francisco Reyes wrote:
> On Tue, 11 Sep 2001, Jason Tan wrote:
>
> >
> > On Mon, 10 Sep 2001, Francisco Reyes wrote:
> >
> > > Does PostgreSQL supports doing an insert with a subselect as it's value?
> > > Something like:
> > > insert into hearn_dates (date)
> > > values ((select distinct merge_date from hearn));
> > > The error I am getting is:
> > > ERROR: More than one tuple returned by a subselect used as an expression.
> >
> > Presumably you slect distinct is returing more than one value/tuple.
> >
> > Run it by hand and see what it returns.
>
> drf=# select distinct merge_date from hearn;
> merge_date
> ------------
> 2000-11-17
> 2001-07-10
> 2001-09-07
> (3 rows)
>
> 3 rows on 1 column.
>
>
>
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Jason Tan jason@rebel.net.au
"Democracy is two wolves and a lamb voting on what to have for lunch.
Liberty is a well-armed lamb contesting the vote."
~Benjamin Franklin, 1759
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