Query returning wrong result, one row is expected but getting ALL

Question

My statement below is returning all the results of the table instead of only with matching n1. I have attached the screenshot of the result. What I am expecting is just the first row. Can someone help me understand what is taking place here please? Result of the Query attached

Create View Proj_Display AS
select * from Proj_d
Where "n" in (Select Student from proj_d);

Answer 1

Create View Proj_Display AS
select * from Proj_d
Where "n1" in (Select Student from proj_d);

This query you have now checks whether value "n1" exists in table proj_d. Which is always true. So I guess you want something like this:

Create View Proj_Display AS
select * from Proj_d
Where Student  in (Select Student from proj_d WHERE Student = 'n1');

But you could do this right away without using a subquery:

Create View Proj_Display AS
select * from Proj_d
Where Student  = 'n1'

But probably you need to give more information what you want exactly