Using this module will export a run_data_sql method into your class.
This method will find SQL statements in the DATA section of the class
it is called from, and execute them against the database that that class
is set up to use.
It is safe to import this method into a Class::DBI subclass being used
as the superclass for a range of classes.
WARNING: this does not do anything fancy to work out what is SQL. It
merely assumes that everything in the DATA section is SQL, and
applies each thing it finds (separated by semi-colons) in turn to your
database. Similarly there is no security checking, or validation of the
DATA in any way.