

Valued Member
Group: General Forum Members
Last Login: Wednesday, October 12, 2016 11:24 PM
Points: 61,
Visits: 422


I have a date query as below:
SET DATEFIRST 1  Sets Monday as First Day of Week
;with mycte as ( select cast('20110101' as datetime) DateValue union all select DateValue + 1 from mycte where DateValue + 1 < '20130702' )
Select DateValue , DATENAME(dw,DateValue) As DayOfWeek , DATENAME(wk,DateValue) As CalendarWeek , Case When DATENAME(wk,DateValue) = 27 And Year(DateValue) = 2012 Then 2013 Else 2012 End As FinancialYear , Case When DATENAME(wk,DateValue) = 27 And Year(DateValue) = 2011 Then 1 When DATENAME(wk,DateValue) = 28 And Year(DateValue) = 2011 Then 2 When DATENAME(wk,DateValue) = 29 And Year(DateValue) = 2011 Then 3 When DATENAME(wk,DateValue) = 29 And Year(DateValue) = 2011 Then 4 When DATENAME(wk,DateValue) = 30 And Year(DateValue) = 2011 Then 5 When DATENAME(wk,DateValue) = 31 And Year(DateValue) = 2011 Then 6 When DATENAME(wk,DateValue) = 32 And Year(DateValue) = 2011 Then 7 When DATENAME(wk,DateValue) = 33 And Year(DateValue) = 2011 Then 8 When DATENAME(wk,DateValue) = 34 And Year(DateValue) = 2011 Then 9 When DATENAME(wk,DateValue) = 35 And Year(DateValue) = 2011 Then 10 When DATENAME(wk,DateValue) = 36 And Year(DateValue) = 2011 Then 11 When DATENAME(wk,DateValue) = 37 And Year(DateValue) = 2011 Then 12 When DATENAME(wk,DateValue) = 38 And Year(DateValue) = 2011 Then 13 When DATENAME(wk,DateValue) = 39 And Year(DateValue) = 2011 Then 14 When DATENAME(wk,DateValue) = 40 And Year(DateValue) = 2011 Then 15 When DATENAME(wk,DateValue) = 41 And Year(DateValue) = 2011 Then 16 When DATENAME(wk,DateValue) = 42 And Year(DateValue) = 2011 Then 17 When DATENAME(wk,DateValue) = 43 And Year(DateValue) = 2011 Then 18 When DATENAME(wk,DateValue) = 44 And Year(DateValue) = 2011 Then 19 When DATENAME(wk,DateValue) = 45 And Year(DateValue) = 2011 Then 20 When DATENAME(wk,DateValue) = 46 And Year(DateValue) = 2011 Then 21 When DATENAME(wk,DateValue) = 47 And Year(DateValue) = 2011 Then 22 When DATENAME(wk,DateValue) = 48 And Year(DateValue) = 2011 Then 23 When DATENAME(wk,DateValue) = 49 And Year(DateValue) = 2011 Then 24 When DATENAME(wk,DateValue) = 50 And Year(DateValue) = 2011 Then 25 When DATENAME(wk,DateValue) = 51 And Year(DateValue) = 2011 Then 26 When DATENAME(wk,DateValue) = 52 And Year(DateValue) = 2011 Then 27 When DATENAME(wk,DateValue) = 53 And Year(DateValue) = 2011 Then 28 When DATENAME(wk,DateValue) = 1 And Year(DateValue) = 2012 Then 28 When DATENAME(wk,DateValue) = 2 And Year(DateValue) = 2012 Then 29 When DATENAME(wk,DateValue) = 3 And Year(DateValue) = 2012 Then 30 When DATENAME(wk,DateValue) = 4 And Year(DateValue) = 2012 Then 31 When DATENAME(wk,DateValue) = 5 And Year(DateValue) = 2012 Then 32 When DATENAME(wk,DateValue) = 6 And Year(DateValue) = 2012 Then 33 When DATENAME(wk,DateValue) = 7 And Year(DateValue) = 2012 Then 34 When DATENAME(wk,DateValue) = 8 And Year(DateValue) = 2012 Then 35 When DATENAME(wk,DateValue) = 9 And Year(DateValue) = 2012 Then 36 When DATENAME(wk,DateValue) = 10 And Year(DateValue) = 2012 Then 37 When DATENAME(wk,DateValue) = 11 And Year(DateValue) = 2012 Then 38 When DATENAME(wk,DateValue) = 12 And Year(DateValue) = 2012 Then 39 When DATENAME(wk,DateValue) = 13 And Year(DateValue) = 2012 Then 40 When DATENAME(wk,DateValue) = 14 And Year(DateValue) = 2012 Then 41 When DATENAME(wk,DateValue) = 15 And Year(DateValue) = 2012 Then 42 When DATENAME(wk,DateValue) = 16 And Year(DateValue) = 2012 Then 43 When DATENAME(wk,DateValue) = 17 And Year(DateValue) = 2012 Then 44 When DATENAME(wk,DateValue) = 18 And Year(DateValue) = 2012 Then 45 When DATENAME(wk,DateValue) = 19 And Year(DateValue) = 2012 Then 46 When DATENAME(wk,DateValue) = 20 And Year(DateValue) = 2012 Then 47 When DATENAME(wk,DateValue) = 21 And Year(DateValue) = 2012 Then 48 When DATENAME(wk,DateValue) = 22 And Year(DateValue) = 2012 Then 49 When DATENAME(wk,DateValue) = 23 And Year(DateValue) = 2012 Then 50 When DATENAME(wk,DateValue) = 24 And Year(DateValue) = 2012 Then 51 When DATENAME(wk,DateValue) = 25 And Year(DateValue) = 2012 Then 52 When DATENAME(wk,DateValue) = 26 And Year(DateValue) = 2012 Then 53 When DATENAME(wk,DateValue) = 27 And Year(DateValue) = 2012 Then 1 End As FiscalWeek  this is only an example From mycte where DateValue between '20110627' and '20120701' OPTION (MAXRECURSION 0)
What is the best way to get the FiscalWeek based on the results from above? I don't want to hard code every single Calendar week to get the corresponding Fiscal Week. Financial Year starts on 01/July




Right there with Babe
Group: General Forum Members
Last Login: Monday, May 23, 2016 9:42 AM
Points: 763,
Visits: 530


For this type of scenario, I would look at maybe implementing a calendar/tally table that holds all the necessary information against each day. My own calendar table stores (for each date) day number in year, fiscal month, fiscal year and other information relevant to the business. It's then just a simple case of linking the date in your transaction table to the calendar table to retrieve the columns required.
We've expanded the calendar table recently to include such delights as: is a working day,is a national holiday, time sheet start day etc.
There's lots of scripts around to generate these tables. SQLServerCentral.com and Google is your friend!
"Be brave. Take risks. Nothing can substitute experience."




Ten Centuries
Group: General Forum Members
Last Login: Wednesday, September 7, 2016 1:56 AM
Points: 1,076,
Visits: 3,227


Well theres a possible typo in your code for the DATEMNAME(wk,DateValue)=29 which is repeated twice.
I dont know if this is by design or not, but it seems odd that you classify week 29 as Week 3 and week 30 as week 5.
A Simpler solution would be to use this case statement
,CASE WHEN DATENAME(wk,DateValue)>=27 then DATENAME(wk,DateValue)26 ELSE DATENAME(wk,DateValue)+27 end
It doesnt take into account any special logic like the WK 29 issue, and assumes every year follows the same pattern.
It also makes the script easier to understand and maintain.
As Robin suggested I would materialise this as a Calendar Table.
_________________________________________________________________________ SSC Guide to Posting and Best Practices



