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A Flexible Day Of Week Function

By Todd Young,

The "DayOfWeek" parameter included as part of the DatePart function
can be a handy tool for limiting data to specific days of the week but
it is not very friendly when the required days need to be passed as a
parameter to a stored procedure.

An alterative method can be used to provide pretty much unlimited
flexibility using an integer value and some constants.

First define your constants as such:

1 = Sunday
2 = Monday
4 = Tuesday
8 = Wednesday
16 = Thursday
32 = Friday
64 = Saturday

To get every Tuesday for the year, use the Tuesday variable.

exec sel_TestDates 4

To get get multiple days, just add the constants together.
If you wanted to just get the weekdays, add Monday through Friday
for a total of 62.

exec sel_TestDates 62

For just the weekends, add Saturday and Sunday.

exec sel_TestDates 65

You can use any combination of values for odd day groupings such as
Monday, Wednesday and Friday.

exec sel_TestDates 42

 

 



 

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