| From: | Peter Eisentraut <peter_e(at)gmx(dot)net> |
|---|---|
| To: | pgsql-general(at)postgresql(dot)org |
| Cc: | Jeff Davis <pgsql(at)j-davis(dot)com>, Robert James <srobertjames(at)gmail(dot)com> |
| Subject: | Re: Relational Algebra and Aggregate Functions |
| Date: | 2009-07-29 07:19:38 |
| Message-ID: | 200907291019.38295.peter_e@gmx.net |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-general |
On Tuesday 28 July 2009 04:38:03 Jeff Davis wrote:
> On Mon, 2009-07-27 at 21:05 -0400, Robert James wrote:
> > 1) Introduction to Database Systems
> > http://www.amazon.com/Introduction-Database-Systems-Kannan-Swamynathan/dp
> >/B001BVYKY4/ref=sr_1_5?ie=UTF8&s=books&qid=1248742811&sr=1-5
> >
> > and
> > 2) Database in Depth: Relational Theory for Practitioners
> > http://www.amazon.com/Database-Depth-Relational-Theory-Practitioners/dp/0
> >596100124/ref=sr_1_7?ie=UTF8&s=books&qid=1248742811&sr=1-7
>
> I recommend #2. It's shorter and easier to read than "An Introduction to
> Database Systems", and I think it will answer your question about
> relational theory and aggregates (see "SUMMARIZE").
Is it weird that "Database in Depth" is shorter and easier than "Introduction
to Database Systems"? And they're by the same author, too.
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