SQL name value with highest value in another column

Question

let's say I have a table like so:

Store    | Item   | Price  
store01  | Apple  | 2.50  
store01  | Pear   | 3.00
store01  | Banana | 3.11  
store02  | Apple  | 2.50  
store02  | Pear   | 2.00
store03  | Banana | 3.10

and I just want a query that lists all the stores and names the most expensive item in that store. So I need something like this:

Store   | Item  
store01 | Banana 
store02 | Apple 
store03 | Banana

I tried something like so:

SELECT "Store",
       (case when (max ("Price") = "Price") then "Item" end) as  "Max price Item"   
FROM Table 
group by "Price","Item","Store";

but the result of that is just:

Store   | Max price Item 
store01 | Apple 
store01 | Pear
store01 | Banana
store02 | Apple
store02 | Pear
store03 | Banana

I am running on dashDB.

Does DashDB support window functions? – Sep 23 '16 at 06:54 — , Sep 23 '16 at 06:54

score 1 · Answer 1 · answered Sep 23 '16 at 06:45

You should use this

SELECT t.Store,
    t.Item
FROM Table t
INNER JOIN
    (SELECT
        Store,
        MAX(Price) AS max_price
    FROM
        Table 
    GROUP BY 
        Store
    ) mt
ON 
    mt.Store = t.Store
    AND mt.max_price = t.Price;

Or other way could be:

SELECT t.Store,
    t.Item
FROM Table t
WHERE (Store, Price) IN
    (SELECT
        Store,
        MAX(Price) AS max_price
    FROM
        Table 
    GROUP BY 
        Store
    );

score 1 · Answer 2 · answered Sep 23 '16 at 06:50

1

Try with the below query

SELECT Store,Item
  FROM YourTable T,
        (SELECT Store,max(Price) MPrice
         FROM YourTable
          GROUP BY Store
         ) AS T1
  WHERE T1.Store=T2.Store AND T1.Price=T2.MPrice

answered Sep 23 '16 at 06:50

Unnikrishnan R

4,965
1
12
21

AT-2017 · Accepted Answer · 2016-09-23T08:00:19.693

1

The following should do the trick:

 SELECT Store, MAX(Price) FROM Table
 GROUP BY Store

Or

 SELECT
  b.Store,
  MAX(b.Price) as MaxPrice,
  MAX(b.Item) as Item
FROM Table b
INNER JOIN (SELECT 
              Store,
              MAX(Price) as MaxPrice
            FROM Table
            GROUP BY Store) a ON 
a.Store = b.Store AND a.MaxPrice = b.Price
GROUP BY b.Store

Sample inputs and outputs:

edited Sep 23 '16 at 08:00

answered Sep 23 '16 at 06:59

AT-2017

3,114
3
23
39

Hi, I don't want the max(Price) ... I want the name of the item with the max price – Mike Pala Sep 23 '16 at 07:06
Updated. Please check. – AT-2017 Sep 23 '16 at 07:12

SQL name value with highest value in another column

3 Answers3