BACKUP DATABASE [YourDB] TO DISK = 'D:\Backups\YourDB.bak' WITH COMPRESSION;
Because Enterprise is a paid, high-scale version, official downloads are restricted to licensed customers: Volume Licensing Service Center (VLSC): microsoft sql server 2017 enterprise download
If you need a sandbox to practice for a certification (like 70-764), grab the . If you need production high-availability, buy a license from a Microsoft reseller and use the VLSC portal. BACKUP DATABASE [YourDB] TO DISK = 'D:\Backups\YourDB
If you have active Software Assurance, you can spin an Azure VM with SQL Server 2017 Enterprise pre-installed at a discounted rate. This is not a "download" per se, but immediate cloud deployment. Because Enterprise is a paid