Question

I want to select all records from a table Log where the DateAndTime field values (of type datetime) are for the day before today, whatever day it is.

So if today is 2011-06-08, I want to select all rows where DateAndTime is greater than or equal to 2011-06-07 00:00:00 and also less than 2011-06-08 00:00:00.

I’m guessing the potential pitfall here would be it’s behaviour on the 1st day of the month, as obviously a date like 2011-06-00 is invalid, and should be 2011-05-31.

Answer 1

For SQL Server 2008 you can use this.

select *
from [log]
where cast(DateAndTime as date) = cast(getdate()-1 as date)

Pre 2008 you can use this

select *
from [log]
where DateAndTime >= dateadd(d, datediff(d, 0, getdate())-1, 0) and
      DateAndTime < dateadd(d, datediff(d, 0, getdate()), 0)

Related on DBA: Cast to date is sargable but is it a good idea?