CREATE TABLE table_203_874 (id NUMBER, "year" NUMBER, "competition" CLOB, "venue" CLOB, "position" CLOB, "event" CLOB, "notes" CLOB)

which venue is listed the most ?
SELECT "venue" FROM table_203_874 GROUP BY "venue" ORDER BY COUNT(*) DESC LIMIT 1
SELECT "venue" FROM "table_203_874" GROUP BY "venue" ORDER BY COUNT(*) DESC FETCH FIRST 1 ROWS ONLY