using max to get the last question of the information
Hi allI have the sample data below
create table ty
( id varchar2(200),
place varchar2(200),
ty_date date,
qty number(30)
);
insert into ty
(id, place, ty_date, qty)
values
('A', 'NY', sysdate, 10);
insert into ty
(id, place, ty_date, qty)
values
('A', 'NY', sysdate, 11);
insert into ty
(id, place, ty_date, qty)
values
('A', 'MN', sysdate, 12);
insert into ty
(id, place, ty_date, qty)
values
('B', 'DC', sysdate, 12);
insert into ty
(id, place, ty_date, qty)
values
('B', 'DC', sysdate, 13);
examples of dataID PLACE QTY V_DATE
NEW YORK 11-5/10 / 2011 13:43:08
NEW YORK 10 5/10 / 2011 13:43:03
A 12 5/10 MINUTES / 2011 13:43:12
B DC 12 5/10 / 2011 13:43:16
B DC 13 5/10 / 2011 13:43:20
and this is the output I desired. the output is the latest data at the last seconds
ID PLACE QTY t_date
A NY 11 5/10/2011 1:43:08 PM
A MN 12 5/10/2011 1:43:12 PM
B DC 12 5/10/2011 1:43:16 PM
B DC 13 5/10/2011 1:43:20 PM
I tried to use the following code to getselect id, k.place, k.qty, max(ty_date) from ty k
group by id, k.place, k.qty;
but he is robed in the wrong exit and I think it has to do with my group of.Any help is appreciated.
select id, k.place, k.qty, ty_date
from ty k
where ty_date = (select max(ty_date) from ty k1 where k1.id = k.id and k.place = k1.place)
Tags: Database
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