CREATE TABLE table_203_531 (id DECIMAL, "date" TEXT, "tournament" TEXT, "location" TEXT, "winner" TEXT, "score" TEXT, "1st prize  ( $ ) " DECIMAL)

who win the last pga tour event of the year ?
SELECT "winner" FROM table_203_531 ORDER BY id DESC LIMIT 1
SELECT "winner" FROM "table_203_531" ORDER BY "id" DESC NULLS LAST LIMIT 1