Extract.data.table      Query a data table
J                       Creates a Join data table
between                 Convenience function for range subset logic.
data.table              Enhanced data.frame
last                    Last item of an object
like                    Convenience function for calling regexpr.
setkey                  Create key on a data table
tables                  Display all objects of class 'data.table'
test.data.table         Runs a set of tests.
