
This is a little example using a little dataset which I found on my harddisk
by random :-)

The file crash.txt contains data from car accidents happened in 1980-1982 in
Nordrhein-Westfalen, a territory of Germany.

6 variables are listed:

First, four variable of the drivers having an accident:
 
age:	1: younger then 25, 2: 25-60 years old, older the 60  
sex:	0: female driver, 1: male driver
alc:	0: driver not drunken, 1: driver drunken 
street:	kind of street: 1: streets in town, 2: country road, 3: autobahn

And second, the kind and cause of accident:

bcrash:	bad crash: number of accidents with combination (age, sex, alc, street), which
	were caused by speeding, risky driving and so on
gcrash: good crash: number of accidents not caused by speeding or risky
	driving with combination (age, sex, alc, street). 

crash.R reads the data, defines a table and saves the data in the database
system. Then we can "ask questions" using SQL-statements. Of course, all this
can be done with dataframes, but more complex things like joins etc. not. One
should look at the comments in crash.R to see RmSQL working.

You will have to create an empty database "crash" before running the
example. This is done by $MSQL_PATH/bin/msqladmin create crash 
