There are two methods for connecting to the RDBMS; connection strings and using ODBC drivers. See Database Connections for more information.
For this example you will use ODBC drivers to connect to PostgreSQL:
This opens the ODBC Data Source Administrator (64-bit) application.
This opens the Create New Data Source dialog box.
This opens the PostgreSQL ANSI ODBC Driver (psqlODBC) Setup dialog box.