CREATE TABLE nuclear_power_plants (id CLOB, name CLOB, latitude CLOB, longitude CLOB, country CLOB, status CLOB, reactortype CLOB, reactormodel CLOB, constructionstartat CLOB, operationalfrom CLOB, operationalto CLOB, capacity CLOB, lastupdatedat CLOB, source CLOB)

Which country has the most capacities of nuclear power plants?
SELECT country FROM nuclear_power_plants GROUP BY country ORDER BY SUM(capacity) DESC LIMIT 1
SELECT "country" FROM "nuclear_power_plants" GROUP BY "country" ORDER BY SUM("capacity") DESC FETCH FIRST 1 ROWS ONLY