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Asked: 2026-05-19T01:13:32+00:00

I have below table in SQL server 2008.Please help to get expected output Thanks.

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I have below table in SQL server 2008.Please help to get expected output

alt text

Thanks.

CREATE TABLE [dbo].[Test]([Category] [varchar](10) NULL,[Value] [int] NULL,
[Weightage] [int] NULL,[Rn] [smallint] NULL ) ON [PRIMARY]

insert into Test values ('Cat1',310,674,1),('Cat1',783,318,2),('Cat1',310,96,3),('Cat1',109,917,4),('Cat2',441,397,1),('Cat2',637,725,2),('Cat2',460,742,3),('Cat2',542,583,4),('Cat2',601,162,5),('Cat2',45,719,6),('Cat2',46,305,7),('Cat3',477,286,1),('Cat3',702,484,2),('Cat3',797,836,3),('Cat3',541,890,4),('Cat3',750,962,5),('Cat3',254,407,6),('Cat3',136,585,7),('Cat3',198,477,8),('Cat4',375,198,1),('Cat4',528,351,2),('Cat4',845,380,3),('Cat4',716,131,4),('Cat4',781,919,5)
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1 Answer

  1. Editorial Team

    For per category Average Weightage

    SELECT
   Category,
   AVG(Value),
   SUM(CASE WHEN RN<4 THEN Weightage ELSE 0 END) / (NULLIF(SUM(CASE WHEN RN<4 THEN 1 ELSE 0 END), 0))
FROM
   MyTable
GROUP BY
   Category

    Average Weightage over the whole set

    SELECT
   M.Category,
   AVG(Value),
   foo.AvgWeightage
FROM
   MyTable M
   CROSS JOIN
   (SELECT AVG(Weightage) As AvgWeightage FROM MyTable WHERE Rn < 4) foo
GROUP BY
   M.Category, foo.AvgWeightage
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