There should be a database perl_example.gdb exists before running the 
example scripts in this directory. The database should contains an empty table 
SIMPLE.

1. insert.pl - insert some records into table SIMPLE
   using: prepare,
			execute (within loop)
   with placeholders / bind values. AutoCommit on.
2. insdo.pl - insert using do() and placeholders. AutoCommit off.
3. select.pl - select and fetch the result
   using: prepare,
			execute,
			fetchrow_array
4. del.pl - delete all inserted record
   using: prepare,
			execute

			