简述数据库导入Oracle SQL*Loader指南

load data 
infile 'c:\data\mydata.csv' 
into table emp 
fields terminated by "," optionally enclosed by '"' 
      ( empno, empname, sal, deptno )

10001,"Scott Tiger", 1000, 40 
      10002,"Frank Naude", 500, 20

load data 
infile * 
replace 
into table departments 
( dept position (02:05) char(4), 
deptname position (08:27) char(20) 
) 
begindata 
COSC COMPUTER SCIENCE 
ENGL ENGLISH LITERATURE 
MATH MATHEMATICS 
      POLY POLITICAL SCIENCE

set echo off newpage 0 space 0 pagesize 0 
feed off head off trimspool on 
spool oradata.txt 
select col1 || ',' || col2 || ',' || col3 
from tab1 
where col2 = 'XYZ'; 
      spool off

rem Remember to update initSID.ora, 
utl_file_dir='c:\oradata' parameter 
declare 
fp utl_file.file_type; 
begin 
fp := utl_file.fopen('c:\oradata','tab1.txt','w'); 
utl_file.putf(fp, '%s, %s\n', 'TextField', 55); 
utl_file.fclose(fp); 
end; 
      /