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 nation has the most nuclear plants under construction?
SELECT country FROM nuclear_power_plants WHERE status = "Under Construction" GROUP BY country ORDER BY COUNT(*) DESC LIMIT 1
SELECT "country" FROM "nuclear_power_plants" WHERE "Under Construction" = "status" GROUP BY "country" ORDER BY COUNT(*) DESC FETCH FIRST 1 ROWS ONLY