How do I select the latest date infor for the multiple dates database

I forgot how to select the data with the latest date from a large database.  Here is an example of my database:

CustomerID   Timestamp                            Expense .....
abc                 11/14/2010 3:30PM              2000.00
abc                 11/15/2010 9:00AM              1500.00
abc                 11/15/2010 9:15AM               1800.00
jjxia2001Asked:
Who is Participating?
 
Rey Obrero (Capricorn1)Commented:
if you are doing this in access


select T.*
from tbl1 as T
Inner Join
(select T2.Customerid, Max(T2.Timestamp) AS MaxOfTimestamp
from tbl1 AS T2
group by T2.Customerid) As T3
On T.Timestamp=T3.MaxOfTimestamp and T.Customerid=T3.Customerid
0
 
cyberkiwiCommented:
Assuming SQL Server - this can't be Exchange can it?

-- from entire table
select top 1 * from tbl order by timestamp desc

-- latest for each customer
select customerid, timestamp, expense
from
(
select customerid, timestamp, expense,
  rn=row_number() over (partition by customerid order by timestamp desc)
from tbl
) sq
where rn=1
0
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