{As of 2021, the airport has actually been rated by Skytrax given that the fourth-very best airport on this planet. Skytrax has also rated the airport as the earth's best international transit airport and one of many earth's cleanest airports.
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Output: As you'll be able to see in the above mentioned output the students with both equally the identical Issue and group Yr are put in exactly the same group. And people whose only SUBJECT is similar although not YEAR belong to unique groups. So here We now have grouped the desk In accordance with two columns or multiple column.