[R] Does SQL group by have a heavy duty equivalent in R

Prof Brian Ripley ripley at stats.ox.ac.uk
Tue Jan 2 02:22:00 CET 2007

On Mon, 1 Jan 2007, BBands wrote:

> On 12/30/06, Farrel Buchinsky <fjbuch at gmail.com> wrote:
>> Instead I used RODBC
>> sqlSave(channel,RawSeq)
>> to push the table into a Microsoft Access database
>> Then a sql query, courtesy of the Microsoft Access Query Wizard a la design
>> mode.
> If SQL does prove to be part of your approach you might want to have a
> look at SQLite. Dirk introduced it to me back when we worked on
> Crusher. We use it for development and some production work. Main
> attributes: simple, fast and light weight.

And it works perfectly well with RODBC, so you don't need yet another 
package.  RODBC even comes with SQLite examples.

BTW, 'fast' is rather misleading: SQLite is often fast for small tasks, 
but can be very slow compared to a more serious DBMS.

> Everything you for R need here:
> http://cran.r-project.org/src/contrib/Descriptions/RSQLite.html
> SQLite's home page:
> http://www.sqlite.org/
> And a Python connector:
> http://initd.org/tracker/pysqlite
>    jab

Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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