CREATE TABLE table_203_156 (id DECIMAL, "team" TEXT, "outgoing manager" TEXT, "manner of departure" TEXT, "date of vacancy" TEXT, "replaced by" TEXT, "date of appointment" TEXT, "position in table" TEXT)

who is the last manager shown to have been appointed ?
SELECT "outgoing manager" FROM table_203_156 ORDER BY "date of appointment" DESC LIMIT 1
SELECT "outgoing manager" FROM "table_203_156" ORDER BY "date of appointment" DESC NULLS LAST LIMIT 1