SQL Server 2019 now supports UTF-8 you can check if you have UTF-8 collations by running the following query :

SELECT Name, Description FROM fn_helpcollations() WHERE Name LIKE...

Thanks for the article, very interresting.

Basically, your "other Unpivot" technique is a brillant way to use the new (from 2008) Table Value Constructor

Using the same method, from your first example...

Removing UAC will only deactivate the warning ("Do you want to allow ...") I receive everytime I "Run as Administrator". It does not resolve my problem.

But thanks for the idea.

Thanks for your answers. I have solved my problem.

I executed [msdb].[dbo].[sp_maintplan_delete_log] to cleanup old log files. Then I shrink the database and it worked.