CREATE TABLE table_203_344 (id NUMBER, "#" NUMBER, "date" CLOB, "opponent" CLOB, "score" CLOB, "win" CLOB, "loss" CLOB, "save" CLOB, "attendance" NUMBER, "record" CLOB, "other info" CLOB)

which team was the opponents of this team the most ?
SELECT "opponent" FROM table_203_344 GROUP BY "opponent" ORDER BY COUNT(*) DESC LIMIT 1
SELECT "opponent" FROM "table_203_344" GROUP BY "opponent" ORDER BY COUNT(*) DESC FETCH FIRST 1 ROWS ONLY