CREATE TABLE table_203_763 (id NUMBER, "year" NUMBER, "competition" CLOB, "venue" CLOB, "position" CLOB, "notes" CLOB)

which competition appears the most on the table ?
SELECT "competition" FROM table_203_763 GROUP BY "competition" ORDER BY COUNT(*) DESC LIMIT 1
SELECT "competition" FROM "table_203_763" GROUP BY "competition" ORDER BY COUNT(*) DESC FETCH FIRST 1 ROWS ONLY