CREATE TABLE table_202_24 (id DECIMAL, "year" DECIMAL, "single" TEXT, "peak chart positions\ fin" DECIMAL, "peak chart positions\ nor" DECIMAL, "peak chart positions\ swe" DECIMAL, "album" TEXT)

which solid base single peaked highest on the finnish singles chart ?
SELECT "single" FROM table_202_24 ORDER BY "peak chart positions\nfin" LIMIT 1
SELECT "single" FROM "table_202_24" ORDER BY "peak chart positions\nfin" NULLS FIRST LIMIT 1