Sql Server - how to get last server restart (DMV reset date/time)
SELECT sqlserver_start_time FROM sys.dm_os_sys_info
Using a prior question (different key words), I ended up using this approach. As always, up to the individual what would be 'best' for them!
SELECT create_date FROM sys.databases WHERE name = 'tempdb'
source: Find out how long the sql server service has been running, from t-sql