Return value at max date for a particular id

Question

Here\'s my sql server table

ID       Date       Value 
___      ____       _____
3241     9/17/12    5
3241     9/16/12    100
3241     9/15/12    20
4355           


        

Answer 1

This would give you what you need:

SELECT 
    m.ID,
    m.Date,
    m.Value
FROM 
    myTable m
    JOIN (SELECT ID, max(Date) as Date FROM myTable GROUP BY ID) as a
    ON m.ID = a.ID and m.Date = a.Date

Answer 2

You can use the following:

select t1.id, t2.mxdate, t1.value
from yourtable t1
inner join
(
  select max(date) mxdate, id
  from yourtable
  group by id
) t2
  on t1.id = t2.id
  and t1.date = t2.mxdate

See Demo

Answer 3

You haven't specified your SQL implementation, but something like this should work:

Note that the op didn't specifically ask to use max(), just to get the id, value at the max[imum] date.

TSQL:

select top 1 ID, Date, Value from yourtable order by Date DESC;

Not TSQL, has to support limit: (Not tested.)

select ID, Date, Value from yourtable order by Date DESC limit 1,1;