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Calculating Percentage

  • August 19, 2014 at 4:25 pm

    #310347

    I have a table Studentgrades

    Create Table Studentgrades

    (

    StudentID Int,

    FirstName Varchar(100),

    Course Varchar(100),

    Score Int

    )

    Now if I need to calculate the percentage of a student using the formula percentage = (Score in a subject/Score obtained by the student in all the subjects)* 100....

    Can I do it using CTE and group by?

    Its giving me an error

  • August 19, 2014 at 4:53 pm

    #1739425

    Maybe something like this:

    SELECT StudentID,

    FirstName,

    Course ,

    Score ,

    (CAST(Score AS numeric( 10, 4)) / SUM(Score) OVER( PARTITION BY StudentID)) * 100

    FROM Studentgrades

    Look for information on the OVER clause or window functions.

    Luis C.
    General Disclaimer:
    Are you seriously taking the advice and code from someone from the internet without testing it? Do you at least understand it? Or can it easily kill your server?

    How to post data/code on a forum to get the best help: Option 1 / Option 2

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