datetime - Current week in current month showing wrong in SQL Server -


this how july month looks like.

enter image description here

i trying pick current week in current month getdate() parameter using below code.

declare @date datetime = getdate() select datepart(day, datediff(day, 0, @date) / 7 * 7) / 7 + 1

expecting result 

date       -> week number 2015-07-01 -> 1 2015-07-06 -> 2 2015-07-13 -> 3

but, instead, result is:

date       -> week number 2015-07-01 -> 5 2015-07-06 -> 1 2015-07-13 -> 2

how first format in sql server?

thanks in advance

this seems right answer

select datediff(week, dateadd(week, datediff(week, 0, dateadd(month, datediff(month, 0, @date), 0)), 0), @date)+1

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