CREATE TABLE table_201_15 (id DECIMAL, "year" DECIMAL, "single" TEXT, "chart positions\ spa" DECIMAL, "album" TEXT)

based on sales figures , what auryn album is the most popular ?
SELECT "album" FROM table_201_15 ORDER BY "chart positions\nspa" LIMIT 1
SELECT "album" FROM "table_201_15" ORDER BY "chart positions\nspa" NULLS FIRST LIMIT 1