CREATE TABLE table_204_561 (id NUMBER, "fence" NUMBER, "name" CLOB, "jockey" CLOB, "age" NUMBER, "handicap  ( st-lb ) " CLOB, "starting price" CLOB, "fate" CLOB)

which jockey is on top in age
SELECT "jockey" FROM table_204_561 ORDER BY "age" DESC LIMIT 1
SELECT "jockey" FROM "table_204_561" ORDER BY "age" DESC FETCH FIRST 1 ROWS ONLY