SQL求教

UPDATE B
  SET B.ID = A.ID,
  B.NAME = A.NAME,
  B.DRIVING= A.DRIVING,
  MODIFIED_TM = SYSDATE FROM DRIVER_A A, DRIVER_B B
  WHERE B.ID != A.ID
  AND B.NAME != A.NAME
  AND B.DRIVING!= A.DRIVING
  AND B.ID = 1  
执行时：PL/SQL报：ORA-00993：SQL命令末正确结束，请问是什么原因？要怎样改才正确？

SQL code

update DRIVER_B 
set (name,DRIVING,MODIFIED_TM ) 
= (select name,DRIVING,sysdate from DRIVER_A where ID = 1 )
where DRIVER_B.id = 1