By Josh Mills
Introduction
For those who are learning R and who may be well-versed in SQL, thesqldf package provides a mechanism to manipulate R data frames using SQL. Even for experienced R programmers, sqldf can be a useful tool for data manipulation. This site provides a useful introduction to SQL. The...

Zero Inflated Models and Generalized Linear Mixed Models with R.
Zuur, Saveliev, Ieno (2012).