CREATE TABLE table_203_409 (id NUMBER, "rank" NUMBER, "representative" CLOB, "party" CLOB, "district" CLOB, "seniority date" CLOB, "notes" CLOB)

who is the congressman with the greatest seniority ?
SELECT "representative" FROM table_203_409 ORDER BY "seniority date" LIMIT 1
SELECT "representative" FROM "table_203_409" ORDER BY "seniority date" FETCH FIRST 1 ROWS ONLY