SCOM supported SQL versions:

SCOM 2012 R2 supported SQL versions:

https://technet.microsoft.com/en-us/library/dn281933(v=sc.12).aspx    (this table doesn’t fit the browser, you need to slide it left and right to see all versions)

SCOM 2016 supported SQL versions:

https://technet.microsoft.com/en-us/system-center-docs/om/plan/planning-sqlserver-design#sql-server-requirements