SQL Server - AVG function

Average Function

Related Article

https://learn.microsoft.com/en-us/sql/t-sql/functions/avg-transact-sql?view=sql-server-ver16

Additionally,

SQL Server Patches

https://learn.microsoft.com/en-us/sql/database-engine/install-windows/latest-updates-for-microsoft-sql-server?view=sql-server-ver16

And 'Jel' is nothing but validating checklist prior to updating any of the patch.

for load balance refer below article

https://social.technet.microsoft.com/wiki/contents/articles/26485.sql-server-load-balancing.aspx