How can I use ROW_NUMBER() if the column name is not identified?

I got a question from my friend.

Question: How can I use ROW_NUMBER() if the column name is not identified?
Answer: There is many ways to achieve it practically.

Example1: 

--Normal Behavior Row number generation

SELECT ROW_NUMBER() OVER(ORDER BY @@ROWCOUNT), * FROM myTable

Example2: 

--Normal Behavior Row number generation

SELECT ROW_NUMBER() OVER(ORDER BY (SELECT NULL)), * FROM myTable

Example3:  

--Random Behavior Row number generation

SELECT ROW_NUMBER() OVER(ORDER BY NEWID()), * FROM myTable