Sql query to get the largest sum of Rating

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Dear Experts,

I have a Table Give below,

ITEM_ID | RATING
-----------------
   1	|   5	 
   1	|   2	 
   1	|   5	
   1	|   1	 
   2	|   5	
   2	|   5	 
   2	|   5	
   3	|   4

I need a Sql query to get the Item_ID of largest sum of Rating...

Eg....

Sum of First Items Ratings = 5 + 2 + 5 + 1 = 13

Sum of Second Items Ratings = 5 + 5 + 5    = 15

Sum of Third Items Ratings = 4

So my out put is = Item_ID = 2 

Coz, it having the highest rating 15 ...

PLease help me..

Thanks...

Dileep

Posted 2-Jun-13 19:09pm

dilzz

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3 solutions

Solution 1

You can get your result using follwong Query

SQL

SELECT ITEM_ID, MAX(SUM(RATING)) AS HighestRate FROM TableName 
GROUP BY ITEM_ID

Posted 2-Jun-13 19:15pm

Bhavesh J

Solution 3

Hi,

Use the below query i hope it will give you result as per your expection.

SQL

select ITEM_ID, Sum(RATING) As TotalRATING, Rank() over (order by Sum(RATING) desc) as CurrentRank from TableName group by ITEM_ID

OutPut-

ITEM_ID |TotalRATING |CurrentRank
2 | 15 | 1
1 | 13 | 2
3 | 4 | 3

Thanks

Zubair

Posted 2-Jun-13 23:57pm

Zubairk1990

Updated 2-Jun-13 23:59pm

v2

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Maciej Los · Accepted Answer · 2013-06-02T19:50:00

To get proper rating, i would suggest you to use RANK()[^] function in case if two (or more) Items will get the same count of points (rating).

SQL

SELECT ITEM_ID, Points, RANK() OVER(ORDER BY Points DESC) AS [Rank]
FROM (
    SELECT ITEM_ID, SUM(RATING) AS Points
    FROM TableName
    GROUP BY ITEM_ID) AS T

More about: Ranking functions[^]