Different Questions on Joins

Different Questions on Joins:

CREATE TABLE [dbo].[one]
(
[x] [varchar](10) NULL
)

CREATE TABLE [dbo].[two]
(
[y] [varchar](10) NULL

)

insert into one values ('A'),('B'),('C'),('C')

insert into two values ('A'),('B'),('C'),('D')

Table one                                                 Table Two

                                                                         

Select X,Y from one inner join two on x=y
Result:

Select X,Y from one left outer  join two on x=y
Result:

Select X,Y from one right outer  join two on x=y
Result:

Select X,Y from one full outer join two on x=y
Result: