You didn’t give too many details, I think what you need is something like this:
SELECT SearchId, getdate() as CreateDate FROM Security.Search
WHERE DATEDIFF(DAY, CreateDate, GETDATE()) < 8 AND DATEPART(DW, CreateDate) != 7
I put in the Github for future reference.
This will take the last seven days but disregard Sunday. If you want to take 7 days in total already disregarding Sunday on account, then change the condition < 8 for <= 8.
The first part of the condition takes the number of days you want (DATEDIFF and GETDATE) and the second part filters Sunday, which is considered the 7th day of the week obtained by the function DATEPART.