SQL-按日期选择日期时间的最大值

Question

Using the below example, I want to get a count of records grouped by Person and Product, for each day.

The example on the left is the data in the SQL Server 2008 database. The data on the right is my desired query result.

I could just substring off the time portion of the date values, then just do a Group By... but ideally the Max(date) would contain the full timestamp...

Answer 1

Is this what you want?

select t.person, t.product, count(*) as cnt, max(t.date) as date
from table t
group by t.person, t.product, cast(t.date as date);