SQL Playground

Show all unique countries that have top universities, sorted alphabetically.

Reference Tables

id	university_name	country	city	student_count	founded_year
1	Harvard University	USA	Cambridge	21000	1636
2	University of Oxford	UK	Oxford	24000	1096
3	Stanford University	USA	Stanford	17000	1885
4	University of Tokyo	Japan	Tokyo	28000	1877
5	ETH Zurich	Switzerland	Zurich	23000	1855
6	University of Cambridge	UK	Cambridge	20000	1209
7	Massachusetts Institute of Technology	USA	Cambridge	11500	1861
8	California Institute of Technology	USA	Pasadena	22000	1891
9	Imperial College London	UK	London	17000	1907
10	University of Melbourne	Australia	Melbourne	47000	1853

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Tip: Use the reference tables above to understand the data structure.