Question: Provide the country with its full name which has the most ethnic group? List them all ethnic group together with its percentage.
SQL: SELECT T1.Name, T2.Name, T2.Percentage FROM country AS T1 INNER JOIN ethnicGroup AS T2 ON T1.Code = T2.Country WHERE T1.Name = ( SELECT T1.Name FROM country AS T1 INNER JOIN ethnicGroup AS T2 ON T1.Code = T2.Country GROUP BY T1.Name ORDER BY COUNT(T2.Name) DESC LIMIT 1 ) GROUP BY T1.Name, T2.Name, T2.Percentage