Question

Hi I have a table tab1 which have 2 columns. The values would be like below

SL_NO     CAL_DATE
807        2012-03-18
808        2012-03-19
....
1170       2013-03-16

I need to select from this table between the range of sl_no is 807 and 1170. Apart from this, i need to select 2 derived columns for a week_no_of_month and week_no_of_year.

week_no_of_month will be first 7 days fall in week 1, next 7 days in week 2 like 4 weeks in a period. Then again it has to initialise from week no 1 till it reaches 4 for every 7 days.

week_no_of_year will start from 1 and it will keep continue for every 7 days till it reaches 52.

Please help me in this.

Answer 1

I’m not sure what exactly you need. This will answer your question, but I suspect that this is not a question that should have been asked:

select datediff (day, 
                 convert(varchar(4), year(CAL_DATE)) + '0101', 
                 CAL_DATE) / 7 + 1 WeekOfYear,
       (day(CAL_DATE) - 1) / 7 + 1 WeekOfMonth

You might take a look at week numbering provided by Sql Server.

UPDATE:

declare @startOfFiscalYear as datetime
set @startOfFiscalYear = '20120318'

select datediff (day, 
                 @startOfFiscalYear, 
                 CAL_DATE) / 7 + 1 WeekOfYear,
       ((datediff (day, @startOfFiscalYear, CAL_DATE)) / 7 % 4) + 1 WeekOfMonth

WeekOfYear is simply day of year divided by seven. WeekOfMonth is day of year divided by seven and then by four leaving modulus only.