Whenever Perl's DBI module is used to work with a database,
you need to supply up to 3 pieces of information in order to specify the
database to which you want to connect:
- DBSource
This is the data source name. It has the special
format: “dbi:drivername:options”, where driver name is the name of the
DBI driver to use, and options is an option string whose exact format
depends on the DBI driver you are using.
- DBUsername
This is usually the SQL user name to use to connect
to the SQL database, but for some database types, it has a different
meaning.
- DBAuth
This is usually the password for DBUsername, but for some
database types, it has a different meaning or is not
required.