SQL-Hackerrank/SQL-1-Advanced-select-solution.sql at main · Durai69/SQL-Hackerrank · GitHub

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Select max(CASE WHEN Occupation = 'Doctor'
THEN Name
ELSE NULL
END),

max(CASE WHEN Occupation = 'Professor'
THEN Name
ELSE NULL
END),

max(CASE WHEN Occupation = 'Singer'
THEN Name
ELSE NULL
END),

max(CASE WHEN Occupation = 'Actor'
THEN Name
ELSE NULL
END)

From (
select name, occupation,
row_number() over (
    partition by Occupation
    order by name
) AS Check_row
from occupations

) As Check_row

group by Check_row;