Overview of accessing relational databases from R. Focuses and demonstrates DBI family (RMySQL, RPostgreSQL, ROracle, RJDBC, etc.) but also introduces RODBC. Highlights DBI's dbApply() function to combine strengths of SQL and *apply() on large data sets. Demonstrates sqldf package which provides SQL access to standard R data.frames.
Presented at the May 2011 meeting of the Greater Boston useR Group.