SQL Server日期数据类型变为nvarchar

Question

After so many years, I have become part of a project that use SQL server. This time it's 2017. I found a very weird behavior when I create a table.

create table test (sampledate date)

If I run above and check the data type of column sampledate , it shows nvarchar instead of date. This causes an error in my application.

Btw I'm using DBVisualizer to check the data type, I believe this is not because of this tool.

Answer 1

Have a look at this section of the Microsoft documentation . It explains that with down-level clients, the backward compatibility of the date data type is ensured by being converted to String/Varchar. So it may really comes from the DBVisualizer usage.
For your app, check the version of the client you use.