You are given a table having the marks of one student in every test (Tests are held every day) . You have to output the tests in which the student has improved his performance. For a student to improve his performance he has to score more than the previous test.
Table : Tests
NOTE : The output should contain one column by the name ‘TestId’ .
NOTE: You only need to implement the given function. Do not read input, instead use the arguments to the function. Do not print the output, instead return values as specified. Still have a question? Checkout Sample Codes for more details.