CREATE TABLE table_203_549 (id NUMBER, "player" CLOB, "team" CLOB, "date" CLOB, "opponent" CLOB, "venue" CLOB)

which teams faced off at miller park ?
SELECT "team" FROM table_203_549 WHERE "venue" = 'miller park' UNION SELECT "opponent" FROM table_203_549 WHERE "venue" = 'miller park'
SELECT "team" FROM "table_203_549" WHERE "venue" = 'miller park' UNION SELECT "opponent" FROM "table_203_549" WHERE "venue" = 'miller park'