Retrieves the dbname from a connection using "baseODBC"
When running a connection using ODBC, the connection string does not contain the name of the database. Pointing to the database is done while setting the ODBC connection, but the program has no "way" to know what the name of the database is. Since we are using sqldf to connect to the base, we need to know the database name, fortunately it is stored in the ODBC connection string. This method gets this name, from a "trial" connection to one of the table of the database.
A string with the name of the database