How to get the last month data and month to date data

Question

Need help in writing the query to get the last month data as well as month to date data.

If today\'s date is Mar 23 2011, I need to retrieve the data from last month

Answer 1

Very helpful page

declare @d datetime = '2011-04-03';

declare @startDate datetime;
select @startDate =
   CAST('01 '+ RIGHT(CONVERT(CHAR(11),DATEADD(MONTH,-1,@d),113),8) AS datetime);
select @startDate;