SQl date calculation

I need to use the first day of previous month, can anybody help me with that please?

Thanks in advance!!

http://www.databasejournal.com/scrip...le.php/3455411

I can't use the function, I need it as aquery.

I have the last day of last month:

select dateadd(ms,-3,DATEADD(mm, DATEDIFF(mm,0,getdate() ), 0))

can't figure out how to get the first day of last month....

select convert(datetime,left(Convert(varchar(8),dateadd(M ,-1,getdate()),112),6)+'01',112)

Another way:

SELECT DATEADD(m, DATEDIFF(m, 0, getdate()) -1, 0)

You can also do this to get the last date of last month:

SELECT DATEADD(m, DATEDIFF(m, 30, getdate()) -1, 30)

Thank you, that worked.