[R] Linking R with Microsoft SQL Server / Client

Mon Feb 12 16:58:14 CET 2007

Yes, you can use RODBC to connect to MS SQL.  You can query, issue
commands, and save to the db from R and it works very well (at least for
me).

For example, with a database named xf, create an ODBC data source and
then link open a connection in R:
library(RODBC)
xf <- odbcConnect("xf", username, password)
Then you can issue commands such as those below:

go <- sqlQuery(xf, "alter table roger_test alter column name varchar(3)
NOT NULL")
go <- sqlQuery(xf, "select * from roger_test")
sqlSave(xf, val, tablename="roger_test", append=TRUE, rownames=FALSE)

HTH,

Roger

-----Original Message-----
From: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of ONKELINX, Thierry
Sent: Monday, February 12, 2007 9:36 AM
To: Steve Friedman; r-help at stat.math.ethz.ch
Subject: Re: [R] Linking R with Microsoft SQL Server / Client

Dear Steve,

Reading the data shouldn't be a problem with RODBC. I've been doing that
plenty of times. I'm not sure about writing, but I suppose you probably
will.

Cheers,

Thierry

------------------------------------------------------------------------
----

ir. Thierry Onkelinx

Instituut voor natuur- en bosonderzoek / Reseach Institute for Nature
and Forest

Cel biometrie, methodologie en kwaliteitszorg / Section biometrics,
methodology and quality assurance

Gaverstraat 4

9500 Geraardsbergen

Belgium

tel. + 32 54/436 185

Thierry.Onkelinx at inbo.be

www.inbo.be 

Do not put your faith in what statistics say until you have carefully
considered what they do not say.  ~William W. Watt

A statistical analysis, properly conducted, is a delicate dissection of
uncertainties, a surgery of suppositions. ~M.J.Moroney

-----Oorspronkelijk bericht-----
Van: r-help-bounces at stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] Namens Steve Friedman
Verzonden: maandag 12 februari 2007 15:15
Aan: r-help at stat.math.ethz.ch
Onderwerp: [R] Linking R with Microsoft SQL Server / Client

Hello

My colleagues and I have recently established a large database (40
tables each with greater than 15 variables) in Microsoft's SQL Server
2000.
Currently we are accessing this database via SQL client running an
Windows
XP.   Our objectives are many fold including running SQL applications,
outputting results to ARC/INFO IMS, production of summarizing tables -
graphs and web interfaces for user accessibility.

The project is still very much in a design phase.  I'm interested in
knowing if we can link R directly to the database  as it is either
stored in SQL Server, or SQL Client, or if we are better off keeping it
simple and extracting ascii (csv)  files from SQL server prior to
processing summarizing and model development.

Any insight provided will be greatly appreciated.

Steve

--
Steve Friedman
Computational Ecology and Visualization Laboratory Michigan State
University

Envisioning Ecosystem Decisions

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