CREATE TABLE table_204_343 (id NUMBER, "nation" CLOB, "model" CLOB, "length" CLOB, "barrel length" CLOB, "weight" CLOB)

which country had the least number of models ?
SELECT "nation" FROM table_204_343 GROUP BY "nation" ORDER BY COUNT("model") LIMIT 1
SELECT "nation" FROM "table_204_343" GROUP BY "nation" ORDER BY COUNT("model") FETCH FIRST 1 ROWS ONLY