Re: Which of the solution is better? - Mailing list pgsql-performance

I don't think there is any. It is just another way to write an outer
join.

On Wed, 2002-12-11 at 00:46, Ron Johnson wrote:
> On Tue, 2002-12-10 at 23:20, Wei Weng wrote:
> > I have two tables A and B where A is a huge table with thousands of rows, B
> > is a small table with only a couple of entries.
> >
> > I want to do something like
> >
> > SELECT
> >     A.ID
> >     A.Name
> > FROM
> >     A JOIN B ON (A.ID = B.ID)
>
> How is this query any different from:
> SELECT
>     A.ID,
>     A.Name
> FROM
>     A,
>     B
> WHERE
>     A.ID = B.ID
>
> > And on the other hand I can have something like this
> >
> > SELECT
> >     A.ID
> >     A.Name
> > FROM
> >     A
> > WHERE
> >     A.ID IN (B_Id_List)
> >
> > B_Id_List is a string concatenation of B.ID. (ie, 1,2,3,4,5 ...)
> >
> > Which one is faster, more efficient?
> >
> > And if you could, which one is faster/more efficient under MS SQL Server 7?
> > I am trying to develop a cross platform query, that is why I need to
> > concern with performance under different databases.
--
Wei Weng
Network Software Engineer
KenCast Inc.