MERGE INTO APLICINSUMOAGRICTALHAO D
USING
(
	SELECT DISTINCT T.AREATOTAL, T.IDTALHAO
	 FROM APLICINSUMOAGRICTALHAO AT
	 INNER JOIN TALHAO T ON T.IDTALHAO = AT.IDTALHAO
) S
	ON(D.IDTALHAO = S.IDTALHAO)
WHEN MATCHED THEN
		UPDATE SET AREAAPLIC = S.AREATOTAL;