need an sql query for the following situation

[shiniskumar]

i need a query to get a collection ...
Following is the situation.
ive got a collection in which item of each element is different.
but each element has an item_id tat can be same.all these elements have weightage... i need to get elements with unique item_id and max weightage.
ie;
i got a collection of elements such as

e1 with item_id as 1 and weightage 7
e2 with item_id as 2 and weightage 10
e3 with item_id as 1 and weightage 8
e4 with item_id as 5 and weightage 10
e5 with item_id as 6 and weightage 10
e6 with item_id as 1 and weightage 6
so my result collection should contain the elements
e3 with item_id as 1 and weightage 8
e2 with item_id as 2 and weightage 10
e4 with item_id as 5 and weightage 10
e5 with item_id as 6 and weightage 10


can i get this in a single sql query? please help

[Purple]

Hi,

are you asking for the item with the highest weightage in each item id ?

Purple

[shiniskumar]

Hi,

are you asking for the item with the highest weightage in each item id ?

Purple

i need toi get chck the maximum weightage only for those elements whose item_id are the same

[Purple]

Hi,

I am sorry, I don't understand - are you asking for the maximum / hightest weightage in each group of item_ids ?

Purple

[Purple]

Hi,

try this:

SELECT     item, item_id, MAX(weightage) AS max_weightage
FROM         YOUR_TABLE
GROUP BY item_id

Regards Purple