How to get the last seven days of one month's data in SQL?

Question

I used below SQL to get last day of the month, but I need last seven days of the month:

DECLARE @dt as DATETIME = '7/29/2018'
DECLARE @LastDayOfTheMonth as DATETIME = DATEADD(DAY, -1, DATEADD(Month, 1, DATEADD(DAY,1 - DAY(@dt),@dt)))

SELECT @LastDayOfTheMonth

I could also use this SQL function in order to get above result, but I need last 7 days of any month's records.

SELECT EOMONTH('7/29/2018')

Answer 1

Just use DATEADD again to take 1 to 6 more days off @LastDayOfTheMonth.

SELECT @LastDayOfTheMonth, DATEADD(DAY,-1,@LastDayOfTheMonth), ..

If you want to return 7 values from a function, suggest making it a table function.