SQLthe licensing approach is somewhat complex and is explained below:
1. version: Standard Version and Enterprise Edition, software features are not different, but the standard version has the following limitations :
a) memory Max 64G
b) 4 maximum CPU identification, and up to 16 cores can be identified
c) cluster supports only 2 hosts
And the Enterprise Edition does not have the above restrictions
2. Software Licensing methods:
a) Authorized by physical CPU core, requires one license per 4 core, no restrictions on connected users (CALs), this authorization supports standard and Enterprise Editions
b) According to the number of physical servers (OS), one license per server (or per OS), with 15 user connections (CALs), the excess user needs to purchase a separate CAL. This authorization method only supports the Standard Edition
SQL Server 2016 authorization notes-standby