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)

What s the most used nuclear reactor model?
SELECT reactormodel FROM nuclear_power_plants GROUP BY reactormodel ORDER BY COUNT(*) DESC LIMIT 1
SELECT "reactormodel" FROM "nuclear_power_plants" GROUP BY "reactormodel" ORDER BY COUNT(*) DESC FETCH FIRST 1 ROWS ONLY