CREATE TABLE table_203_830 (id DECIMAL, "year" DECIMAL, "song" TEXT, "chart positions\ us country" DECIMAL, "chart positions\ can country" DECIMAL, "album" TEXT)

which album contained the most successful song in the charts ?
SELECT "album" FROM table_203_830 ORDER BY "chart positions\nus country" LIMIT 1
SELECT "album" FROM "table_203_830" ORDER BY "chart positions\nus country" NULLS FIRST LIMIT 1