CREATE TABLE table_203_324 (id DECIMAL, "chord" TEXT, "root" TEXT, "major third" TEXT, "perfect fifth" TEXT, "minor seventh" TEXT)

name the note that appears last on the minor seventh column of the table .
SELECT "minor seventh" FROM table_203_324 ORDER BY id DESC LIMIT 1
SELECT "minor seventh" FROM "table_203_324" ORDER BY "id" DESC NULLS LAST LIMIT 1