Nested Dateadd function for Date range.... any ideas?

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Nested Dateadd function for Date range.... any ideas?

shalaran

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Points: 63
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March 9, 2015 at 8:00 pm

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Sean Lange SSC Guru Points: 286609 More actions · Answer 1

shalaran (3/9/2015)
Hi,
I'm working on a tsql query to return a column with the summed time units for each week. However, I'm only getting a summed total at Week6, and am out of ideas... Could anyone point me in the right direction? Any assistance is greatly appreciate and thank you in advance!
Week1 = ISNULL(SUM(CASE WHEN tdate Between DATEADD(Week,-4,DateColumn) AND DATEADD(DAY,-1,DATEADD(WEEK,-3,DateColumn) THEN (Hours) END),0 ),
Week2 = ISNULL(SUM(CASE WHEN tdate BETWEEN DATEADD(WEEK,-3,DateColumn) AND DATEADD(DAY,-1,DATEADD(WEEK,-2,DateColumn)) THEN (Hours) END),0 ),
Week3 = ISNULL(SUM(CASE WHEN tdate BETWEEN DATEADD(WEEK,-2,DateColumn) AND DATEADD(DAY,-1,DATEADD(WEEK,-1,DateColumn)) THEN (Hours) END),0 ),
Week4= ISNULL(SUM(CASE WHEN tdate BETWEEN DATEADD(Week,-1,DateColumn) AND DateColumn THEN (Hours) END),0 )

Hi and welcome to the forums. It is impossible to say what may be the problem from this brief snippet. Please take a few minutes and read the first article referenced in my signature for best practices when posting questions.

_______________________________________________________________

Need help? Help us help you.

Read the article at http://www.sqlservercentral.com/articles/Best+Practices/61537/ for best practices on asking questions.

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Cross Tabs and Pivots, Part 1 – Converting Rows to Columns - http://www.sqlservercentral.com/articles/T-SQL/63681/
Cross Tabs and Pivots, Part 2 - Dynamic Cross Tabs - http://www.sqlservercentral.com/articles/Crosstab/65048/
Understanding and Using APPLY (Part 1) - http://www.sqlservercentral.com/articles/APPLY/69953/
Understanding and Using APPLY (Part 2) - http://www.sqlservercentral.com/articles/APPLY/69954/

Jeff Moden SSC Guru Points: 1004686 More actions · Answer 2

shalaran (3/9/2015)
Hi,
I'm working on a tsql query to return a column with the summed time units for each week. However, I'm only getting a summed total at Week6, and am out of ideas... Could anyone point me in the right direction? Any assistance is greatly appreciate and thank you in advance!
Week1 = ISNULL(SUM(CASE WHEN tdate Between DATEADD(Week,-4,DateColumn) AND DATEADD(DAY,-1,DATEADD(WEEK,-3,DateColumn) THEN (Hours) END),0 ),
Week2 = ISNULL(SUM(CASE WHEN tdate BETWEEN DATEADD(WEEK,-3,DateColumn) AND DATEADD(DAY,-1,DATEADD(WEEK,-2,DateColumn)) THEN (Hours) END),0 ),
Week3 = ISNULL(SUM(CASE WHEN tdate BETWEEN DATEADD(WEEK,-2,DateColumn) AND DATEADD(DAY,-1,DATEADD(WEEK,-1,DateColumn)) THEN (Hours) END),0 ),
Week4= ISNULL(SUM(CASE WHEN tdate BETWEEN DATEADD(Week,-1,DateColumn) AND DateColumn THEN (Hours) END),0 )

Week 6? Where's that at in the code above??? Also, would you please post the complete code and see the link that Sean suggested?

--Jeff Moden

RBAR is pronounced "ree-bar" and is a "Modenism" for Row-By-Agonizing-Row.
First step towards the paradigm shift of writing Set Based code:
________Stop thinking about what you want to do to a ROW... think, instead, of what you want to do to a COLUMN.

Change is inevitable... Change for the better is not.

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