I couldn't find a location on w3schools to download the database, so I googled it. I found that user AndrejPHP created a query to create the database in SQL, however ...

SET DEF ON TERM OFF ECHO ON FEED OFF VER OFF HEA ON LIN 2000 PAGES 100 LONG 8000000 LONGC 800000 TRIMS ON TI OFF TIMI OFF SERVEROUT ON SIZE 1000000 NUMF "" SQLP SQL>; ...

The “A network-related or instance-specific error occurred while establishing a connection to SQL Server” message appears when your app or client cannot reach the ...