Why can one instance create multiple SAS instances? Isn't it case insensitive?

Someone in the Forum asked if the SQL Server account can be case-sensitive. In fact, it is okay, but there are prerequisites.

 

Many people think that only passwords of SQL Server are case-sensitive, while SQL login accounts are case-insensitive. The default SQL Server login account is case insensitive, but if you install
If the server sorting rule is case-sensitive, the login account of SQL Server will also be case-sensitive (for SA accounts, you can create SA, SA, and SA ).

 

For example, my sorting rules are case sensitive:

 

Select
Serverproperty ('colation ')

------

Chinese_prc_cs_as

 

 

You can create four SAS instances: