[R] Accessing MySQL Database in R

PtitBleu ptit_bleu at yahoo.fr
Thu Jan 20 14:55:27 CET 2011


I used to use RMySQL but as there is no more package for windows, I decided
to move to RODBC.
I installed ODBC driver for MySQL (downloaded on the MySQL website) and then
the RODBC package.

I finally discovered that it was not needed to "register" your database with
ODBC before using it.
These commands below work for me.

ch<-odbcDriverConnect(connection="SERVER=localhost;DRIVER=MySQL ODBC 5.1
resultdb<-sqlQuery(ch,"SELECT * from my_table")

Try to modify them for your case.
I hope it will work for you.
Good luck,
Ptit Bleu.

Re: Accessing MySQL Database in R
Jan 18, 2011; 12:10am — by djmuseR [User is online] djmuseR

Because R does not have a direct interface to MySQL?

You need to load a communication package - the two most common ones are
RODBC and RMySQL. The former requires that you register your MySQL database
table(s) with ODBC before using the RODBC package on them, whereas the
latter works with specific version combinations of MySQL and R. The RODBC
package has a very informative vignette; for information re the RMySQL
package, see


On Mon, Jan 17, 2011 at 1:30 PM, schlafly <[hidden email]> wrote:

> I have a local installation of MySQL on my computer.
> I enter the following to access MySQL from the command line:
> /Applications/MAMP/Library/bin/mysql -h localhost -u root -p
> I am then prompted for a password, and I use: root
> This connects me to MySQL in the command line.
> I now want to access MySQL databases in R. I enter the following:
> mysql <- dbDriver("MySQL")
> conn <- dbConnect(mysql,user='root',host='localhost', password='root')
> I get the following error message: Error in mysqlNewConnection(drv, ...) :
> RS-DBI driver: (Failed to connect to database: Error: Access denied for
> user
> 'root'@'localhost' (using password: YES)
> Does anyone know why these aren't equivalent?
> --
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