#816 Unicode support for the Microsoft SQL driver does not work

[HyP3r]

As far as I understand it, there are two ways to get Unicode characters into the database with Microsoft SQL:

• You use a varchar column (each character has 1 byte), then use a UTF-8 collation. This function is only available since SQL Server 2019.
• You can use a nvarchar column (each character has 2 bytes).
  Then in the second step, I think you always have to use the N prefix for strings in SQL queries. For example:
  UPDATE foo SET bar = N'д'; (please note the Russian Unicode character as an example).

I have looked at the code from Adminer and the preparation of strings is not given in the driver so solving this is not so easy. Otherwise I would have made a pull request.

[Jakub Vrána]

This should be fixed by 4bc9a29.