expdp userid='ecp_v_1_5/ecp' schemas=ecp_v_1_5 directory=DATA_FILE_DIR dumpfile=ecp_v_1_5.dmp  logfile=ecp_10.log version=10.2.0.1.0
  impdp userid='ecp_v_1_5/ecp' schemas=ecp_v_1_5 directory=DATA_FILE_DIR dumpfile=ecp_v_1_5.dmp version=10.2.0.1.0
  1.查看目录及权限
  SELECT privilege, directory_name, DIRECTORY_PATH FROM user_tab_privs t, all_directories d WHERE t.table_name(+) = d.directory_name ORDER BY 2, 1;
  2.创建DIRECTORY
  create OR REPLACE directory DATA_FILE_DIR as 'E:oracledemoschemasales_history';
  3.授权
  Grant read,write on directory DATA_FILE_DIR to dcops;