Re: How can I get the start date & end date of given week number or month

Hi All,

Sorry for my late response, it took a week for me and my colleague to find solution (googled also ). That may not a best solution but we can handle the necessary logic at this time. Below is our solution for calculating start date and end date for specific week number.

---------------Start Date & End Date for Given Week Number-------------

IF (week_count = min_week AND year_count = min_year)

     --first week will not be add 7 days

    SELECT next_date_week = dateadd(dd, 0, min_date_time)

ELSE IF (week_count = 1)

    SELECT start_date = CONVERT(DATETIME, CONVERT(VARCHAR(4), year_count) + '-1-1')

ELSE

     -- add 7 days to get the next week

     SELECT next_date_week = dateadd(dd, 7, next_date_week)

SELECT dw_number = datepart(dw, next_date_week)  --get day of week number

SELECT to_first_dw = (dw_number -1) * -1,  --get number of days to subtract to get week start

to_last_dw = 7 - dw_number          --get number of days to add to get week end

--Get the start date and end date of week_count, ready for calculate chart data

SELECT start_date = dateadd(dd,to_first_dw, next_date_week),

        end_date = dateadd(dd,to_last_dw, next_date_week)

Thanks

Khoa Tran