SQL same column name allowed

Question

When I run this query in SQL Server

SELECT custid AAA, companyname AAA
FROM Sales.Customers
WHERE country = \'USA\'

It\'s running fine. But

Answer 1

You are giving two same aliases name to different column that will render as duplicate column in one table.

That's why it is giving error.

If you will make it different alias name then error will not occur.just try it and let me know whether it will work or not.