First day of the next month

Question

I\'m trying get the results where it only displays OrderDates before the LAST day of the CURRENT month. I\'m guessing it would be like this...

SELECT OrderDate
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Answer 1

Let's understand the method to get first day of current month, we can fetch day component from the date (e.g. @mydate) using DATEPART and subtract this day component to get last day of previous month. Add one day to get first day of current month. E.g. @mydate = 10/8/2019, subtract day component (8 days) will give us 9/30/2019. Now add one day in this outcome to get first of the current month - 10/1/2019.

Formula - DATEADD(day,1,DATEADD(day, -DATEPART(day,@mydate), @mydate))

Now First of the next month - Add one month in above formula DATEADD(month,1,(DATEADD(day,1,DATEADD(day, -DATEPART(day,@mydate), @mydate))))