May 21, 2009

Finding the date last year based on the current week and weekday using SQL Server

Today is the 21st of May, 2009 and it is a Thursday today. Have you wondered what date was Thursday last year in the same week? Here's a very handy query by Hector which displays the last year's date based on the current weekday and current week


SELECT DATEADD(day, (DATEPART(week, GETDATE()) * 7


+ DATEPART(weekday, GETDATE()))


- (DATEPART(week, DATEADD(year, -1, GETDATE())) * 7


DATEPART(weekday, DATEADD(year, -1, GETDATE()))), DATEADD(year, -1, GETDATE())) as LastYearDate




RESULT


LastYearDate


2008-05-22 11:14:26.350



About The Author

Suprotim Agarwal, ASP.NET Architecture MVP works as an Architect Consultant and provides consultancy on how to design and develop Web applications.

Suprotim is also the founder and primary contributor to DevCurry, DotNetCurry and SQLServerCurry. He has also written an EBook 51 Recipes using jQuery with ASP.NET Controls.

Follow him on twitter @suprotimagarwal

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