Question

I need to group some records based on a date but it is a date and time field and I need to ignore the time part of is and just group by the date part – here is my SQL as it stands:

SELECT        AutoShipItems.CustomerID,AutoShipItems.NextOrderDate,     Customer.FirstName,Customer.LastName, Customer.EmailAddress FROM             AutoShipItems          INNER JOIN    Customer ON              AutoShipItems.CustomerID =Customer.CustomerID WHERE          (AutoShipItems.NextOrderDate <= GETDATE()) GROUP BY      AutoShipItems.CustomerID, AutoShipItems.NextOrderDate,      Customer.FirstName, Customer.LastName,      Customer.EmailAddress ORDER BY      AutoShipItems.NextOrderDate 

Answer 1

You can group by this:

cast(floor(cast(AutoShipItems.NextOrderDate as float)) as datetime) 

I put this into a scalar user-defined function to make it easier:

create function [dbo].[xfn_TrimTimeFromDateTime] (     @date as datetime ) returns datetime with schemabinding as begin     --- Convert to a float, and get the integer that represents it.     --- And then convert back to datetime.     return cast(floor(cast(@date as float)) as datetime) end 

Which you would then call like this:

GROUP BY     AutoShipItems.CustomerID,      dbo.xfn_TrimTimeFromDateTime(AutoShipItems.NextOrderDate),      Customer.FirstName, Customer.LastName, Customer.EmailAddress 

Note that you might have to change the values in the SELECT clause, since you are grouping by something different now.