SYS@ncbeta>select owner,DIRECTORY_NAME,DIRECTORY_PATH from dba_directories;

create table ex_stu
(name varchar2(10),subject varchar2(10),score number(3))
organization external
( type oracle_loader default directory suaccess parameters
( records delimited by newline
logfile  su:'ex_sut_log.log' --这里su:可以不用输入
fields terninated by ','
missing field values are null --詹国坤没有成绩null处理
(name,subject,score))
location ('student.txt'))  --这里两个))
parallel reject limit unlimited ;

 create table ex_stu
(name varchar2(20),subject varchar2(10),score number(3))
organization external
(type oracle_loaderdefault directory suaccess parameters(records delimited by newlinelogfile 'ex_sut.log' fields terminated by ','missing field values are null
(name,subject,score))
location ('student.txt'));

Field Definitions for table EX_STU
  Record format DELIMITED BY NEWLINE
  Data in file has same endianness as the platform
  Rows with all null fields are accepted

Fields in Data Source:

NAME                            CHAR (255)
      Terminated by ","
      Trim whitespace same as SQL Loader
    SUBJECT                         CHAR (255)
      Terminated by ","
      Trim whitespace same as SQL Loader
    SCORE                           CHAR (255)
      Terminated by ","
      Trim whitespace same as SQL Loader
error processing column NAME in row 5 for datafile d:\xs\student.txt
ORA-12899: value too large for column NAME (actual: 11, maximum: 10)