A New Major Version of SQL Server changes the engine while database compatibility, query plans, and deprecated features need separate review.
Which SSMS Version Can Connect to Which SQL Server Version
Choose an SSMS version for your SQL Server targets, check client and engine builds, and handle newer encryption defaults.
An Upgrade Checklist That Fits on One Page
An upgrade checklist that fits on one page keeps before, during, and after checks visible, including backups, logins, jobs, clients, and rollback.
Restoring a Backup From an Older SQL Server Version: What Changes
Restore a backup from an older SQL Server into a test database, read the upgrade messages, and check compatibility and integrity.
Protecting an Instance You Cannot Patch Any More
Protect an Instance You Cannot Patch with isolation, least privilege, disabled features, tested backups, and a firm retirement date.
When to Upgrade: RTM, First CU or Later
Decide When to Upgrade SQL Server by weighing new features, early defects, support needs, and evidence from your own workload.
Planning a Move Off an Old SQL Server Version
Plan a move off an old SQL Server version with a complete inventory, compatibility testing, a supported target, and a dated exit plan.