AMAZON INTERVIEW QUESTION - Current year marks vs Previous year marks

 DML Script:

DROP TABLE IF EXISTS StudentDetails

CREATE TABLE StudentDetails( [Student_Name] varchar(30), [Total_Marks] int , [Year] int) INSERT INTO StudentDetails VALUES('Rahul',90,2010) ,('Sanjay',80,2010) ,('Mohan',70,2010) ,('Rahul',90,2011) ,('Sanjay',85,2011) ,('Mohan',65,2011) ,('Rahul',80,2012) ,('Sanjay',80,2012) ,('Mohan',90,2012)

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