odbc_data_source(?DSN,
?Description)Query the defined data sources. It is not required to have any open
connections before calling this predicate. DSN is the name of
the data source as required by odbc_connect/3. Description
is the name of the driver. The driver name may be used to tailor the SQL
statements used on the database. Unfortunately this name depends on the
local installing details and is therefore not universally useful.