zxo102 ouyang wrote:
Hi everyone,
I have a table "test" which has three fields:
id data date_time
1 2 2009-10-1 12:12:12
1 10 2009-10-1 12:22:10
2 3 2009-10-1 12:10:32
2 1 2009-10-1 12:30:32
with the sql:
select max(data), id from test where 1=1 group by id
I can get
10 1
3 2
but I want corresponding "date_time" like
10 1 2009-10-1 12:22:10
3 2 2009-10-1 12:10:32
if I use the sql below
select max(data), id, date_time from test where 1=1 group by id, date_time
that won't give the correct results I want.
This seems to produce the right results:
select max(data), id, (select max(date_time) from test where id=t1.id)
from test t1 group by id;
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