Comments on: SQL SERVER – SQL SERVER – UDF – Get the Day of the Week Function – Part 2

By: Ade Bunky

Ade Bunky — Wed, 17 Aug 2011 14:32:14 +0000

Simply write.
SELECT DATENAME(WEEKDAY, GETDATE())

WHY ALL THIS?:
”
CREATE FUNCTION dbo.udf_DayOfWeek(@dtDate DATETIME)
RETURNS VARCHAR(10)
AS
BEGIN
DECLARE @rtDayofWeek VARCHAR(10)
DECLARE @weekDay INT
– Here I have subtracted 7 For keeping Sunday as the First day
– like wise for Monday we need to subtract 2 and so on
SET @weekDay = ((DATEPART(dw,GETDATE())+@@DATEFIRST-7)%7)
SELECT @rtDayofWeek = CASE @weekDay
WHEN 1 THEN ‘Sunday’
WHEN 2 THEN ‘Monday’
WHEN 3 THEN ‘Tuesday’
WHEN 4 THEN ‘Wednesday’
WHEN 5 THEN ‘Thursday’
WHEN 6 THEN ‘Friday’
WHEN 7 THEN ‘Saturday’
END
RETURN (@rtDayofWeek)
END
GO
SELECT dbo.udf_DayOfWeek(GETDATE())
“

By: Joe

Joe — Thu, 10 Dec 2009 19:32:00 +0000

Use B
select datename(weekday,date) as day,sum(amount)as sales
from afa
where afatypex in (63)
and date >= ’7/1/2008′
and date <'7/1/2009'
Group by date
Order by date asc

This simple query gives me the sales amounts by weekday Monday thru Sunday which is great but what I'm wanting to do is strip out days Sun thru Wednesday for a grand total for the entire lenth of data

Example:

Monday 68874.0000
Tuesday 91701.0000
Wednesday 223098.0000
Thursday 74457.0000
Friday 114947.0000
Saturday 252631.0000
Sunday 47100.0000
Monday 68874.0000
Tuesday 91701.0000
Wednesday 223098.0000
Thursday 74457.0000
Friday 114947.0000
Saturday 252631.0000
Sunday 47100.0000

maybe I should use the datepart(weekday,date) and then in the where clause say date like '%7,1,2,3,4%' or date in (7,1,2,3,4) but it won't let me do that?

Anyone have a suggestions?

By: Joe

Joe — Tue, 08 Dec 2009 22:54:04 +0000

Do you know how to get the actual weekday name on a date function.

i.e.

Mon
Tues
Wed

I think it’s

SELECT DATENAME(dw, GETDATE()) but it’s not giving me the actual name of the day of the week?

By: Kristjan Farrugia

Kristjan Farrugia — Tue, 27 Oct 2009 17:03:59 +0000

Thanks Pinal :)

By: george

george — Wed, 22 Jul 2009 08:58:34 +0000

is this work with sql 2000

By: Ray

Ray — Mon, 19 Jan 2009 05:21:49 +0000

Thanks a lot for this – right on the button and saved me a deal of work.

Great stuff

Ray

Sydney
Australia

By: SQL SERVER - SQL SERVER - UDF - Get the Day of the Week Function - Part 3 Journey to SQL Authority with Pinal Dave

Mon, 09 Jun 2008 16:47:56 +0000

[...] 27, 2008 by pinaldave Datetime functions and stored procedures always interests me. Nanda Kumar has suggested modification to previous written article about SQL SERVER – SQL SERVER – UDF – Get [...]

By: Nanda KUmar

Nanda KUmar — Mon, 09 Jun 2008 05:44:33 +0000

Hi Pinal,

Actually the function u posted is returning ‘NULL’ for Saturdays and works for rest all days. And you didn’t use the given argument inside the funciton instead you used getdate(). this also returns error. The following is working…

Create FUNCTION dbo.udf_DayOfWeek(@dtDate DATETIME)
RETURNS VARCHAR(10)
AS
BEGIN
DECLARE @rtDayofWeek VARCHAR(10)
DECLARE @weekDay INT
–Here I have subtracted 7 For keeping Sunday as the First day like wise for Monday we need to subtract 2 and so on
set @weekDay=((DATEPART(dw,@dtDate)+@@DATEFIRST-7)%7)
SELECT @rtDayofWeek = CASE @weekDay
WHEN 1 THEN ‘Sunday’
WHEN 2 THEN ‘Monday’
WHEN 3 THEN ‘Tuesday’
WHEN 4 THEN ‘Wednesday’
WHEN 5 THEN ‘Thursday’
WHEN 6 THEN ‘Friday’
WHEN 0 THEN ‘Saturday’
END
RETURN (@rtDayofWeek)
END
GO

select dbo.udf_dayofweek(getdate())

I’m happy to reply this post as Novice DBA

Nandha

By: Sudev Gandhi

Sudev Gandhi — Thu, 05 Jun 2008 17:11:12 +0000

Hi Pinal,

I’m also surprised to see effort you’ve put to retrive Day of week for a given date. DATENAME function can perform this task pretty well.

I’m sure you must be aware of this function but you might have face some issue with it. Could you please share those issues wit DATENAME function?

Thanks & Regards,
Sudev Gandhi
[http://sudev.blogspot.com

By: Simon Worth

Simon Worth — Wed, 04 Jun 2008 12:35:01 +0000

I’m still a little confused as to why you would want to go through the trouble of calling a UDF with 18 to 20 lines of code when the SQL Server development team has already done it for you.

SELECT DATENAME(dw, GETDATE())

I do understand the fun that can be had with trying to solve complex problems with T-SQL, but this is not one of those complex problems. It’s built in to the system for anyone to use when ever they want.