CREATE TABLE table_203_370 (id NUMBER, "year" NUMBER, "competition" CLOB, "venue" CLOB, "position" CLOB, "event" CLOB, "notes" CLOB)

which competition is listed the most in this chart ?
SELECT "competition" FROM table_203_370 GROUP BY "competition" ORDER BY COUNT(*) DESC LIMIT 1
SELECT "competition" FROM "table_203_370" GROUP BY "competition" ORDER BY COUNT(*) DESC FETCH FIRST 1 ROWS ONLY