Getting Over Weekends in SQL

Question

I am using SQL server 2008 and have a query that runs daily.
Where [Order Date] = getdate()-1 I need a statement that will run Monday and sum the data for Friday, Saturday, and Sunday if that is even possible.

Thanks!

Answer 1

You could do something like this to select all the records within a certain range:

SELECT *
FROM your_table
WHERE ((DATEPART(dw, date_created) + @@DATEFIRST) % 7) IN (5,6,0)

Where:

5 = Friday
6 = Saturday
0 = Sunday

Answer 2

select
case DATEPART(weekday,getdate())
when 2 then SUM(weekend just gone)
else SUM(yesterday)
end as totalamount
from
etc...

You need to check what weekday number is Monday though!