Question

I have a query where I am calculating total days between two days including start and end date by the following SQL query. If the end date is not null, then end date is considered as current date.

This query does the job. But I do not want to count Sat and Sundays. Possible public UK Holidays.(I can do this one, if I can get the logic for Saturdays and Sundays)

SELECT  DateDiff(day,DateADD(day,-1,StartDate),ISNULL(EndDate,getDate()))numberOfDays
        FROM <mytable>

How do I count only weekdays between two dates?

Thank you

Answer 1

try this

SELECT  DateDiff(day,DateADD(day,-1,StartDate),ISNULL(EndDate,getDate())) - 
( CASE WHEN DATENAME(dw, StartDate) = 'Sunday' OR 
DATENAME(dw,ISNULL(EndDate,getDate())) = 'Sunday' THEN 1 ELSE 0 END)
- ( CASE WHEN DATENAME(dw, StartDate) = 'Saturday' OR 
     DATENAME(dw,ISNULL(EndDate,getDate())) = 'Saturday' THEN 1 ELSE 0 END)
numberOfDays         
FROM <mytable>