How do you print the day name given a day number in SQL Server 2005 using SQL commands?

Question

I want to be able to pass in a day number like 1, 2, 3 or 7 and it will return the day name like Sunday, Monday, Tuesday or Saturday. I know there is the option of using a <

Answer 1

SELECT DATENAME(DW,CAST(a AS INT))

Here we can change the value of a as 0 to 6
Default, 0-Monday to 6- Sunday.
If we use a=7 then it will be calculated as 0, because 7-7=0.