SQL文 Update From 写法

UPDATE A
	SET
		A.IDANSID	= ISNULL(B.STSID, ''),
		A.IDUPDUSER	= 2,
		A.DTUPDATE	= CONVERT(NVARCHAR(10), GETDATE(), 111),
		A.TMUPDATE	= CONVERT(NVARCHAR(8), GETDATE(), 108)
	FROM
		JNJT0001 A
		LEFT JOIN ZRECRPCWJSID B
		ON
			B.IDACCOUNT = A.IDLOGIN
	WHERE
		A.IDSYSUSER >= 1000
UPDATE A
	SET
		A.IDANSID	= ISNULL(B.STSID,