http://cogniza.com/wordpress Business-Intelligence Specialists Sat, 30 Apr 2011 13:22:21 +0000 http://wordpress.org/?v=2.9.2 en hourly 1 http://cogniza.com/wordpress/2009/11/05/sql-server-date-arithmetic/ http://cogniza.com/wordpress/2009/11/05/sql-server-date-arithmetic/#comments Fri, 06 Nov 2009 02:32:24 +0000 Craig Buchanan http://www.cogniza.com/blog/?p=106 Useful, dynamically-generated dates for SQL Server.

--[1st day of current month]: use the GetDate(), Month(), and Year() functions to determine the current month and year. Build a string using these values in MM/01/YYYY format. Convert the String to DateTime.
CAST( CAST( Month(GetDate()) AS Char(2) ) + '/01/' + CAST( Year(GetDate()) AS Char(4)) AS DateTime)

--[Last day of current month]: add a month to [1st day of current month], then subtract a day.
DateAdd(m, 1, CAST( CAST( Month(GetDate()) AS Char(2) ) + '/01/' + CAST( Year(GetDate()) AS Char(4)) AS DateTime)) -1

--[1st day of prior month]: subtract a month from [1st day of current month].
DateAdd(m, -1, CAST( CAST( Month(GetDate()) AS Char(2) ) + '/01/' + CAST( Year(GetDate()) AS Char(4)) AS DateTime))

--[Last day of prior month]: subtract a day from [1st day of current month].
CAST( CAST( Month(GetDate()) AS Char(2) ) + '/01/' + CAST( Year(GetDate()) AS Char(4)) AS DateTime) -1


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