一、教你一招不用编程序的:1:在pl/sqldev里面把这个表的内容SELECT出来;2:拷贝,复制到EXCEL中3:把EXCEL文件另存为.CSV文件4:用记事本把.CSV文件打开!出来了二、setlinesize1000setpagesize0sete...SyntaxHig
一、
1: 在pl/sql dev里面把这个表的内容SELECT出来;
2:拷贝,复制到EXCEL中
3:把EXCEL文件另存为 .CSV文件
4:用记事本把.CSV文件打开!
出来了
二、
set linesize 1000
set pagesize 0
set echo off
set termout off
set heading off
set feedback off
spool c:\test\try2.txt
select id||&＃39;,&＃39;||user_name||&＃39;,&＃39;||age from us;
spool off
/
------------------------生成的txt需要掐头去尾，对超大表没法搞
三、使用utl_file包
#首先声明存储生成txt文件的目录，注意oracle要有写权限，其权限不能由自己赋给自己，必须由sysbas赋给
create directory DIR_DUMP as &＃39;/home/oracle/&＃39;;
conn / as sysdba
grant read,write on directory dir_dump to psbc; (或者是public;)
CREATE OR REPLACE PROCEDURE xixi
IS
declare testjiao_handle UTL_FILE.file_type;
BEGIN
testjiao_handle := UTL_FILE.FOPEN(&＃39;DIR_DUMP&＃39;,&＃39;testjiao.txt&＃39;,&＃39;w&＃39;);
FOR x IN (SELECT * FROM TESTJIAO) LOOP
UTL_FILE.PUT_LINE(testjiao_handle,x.ID || &＃39;,&＃39; || x.RQ ||&＃39;,&＃39;);
END LOOP;
EXCEPTION WHEN OTHERS THEN
DBMS_OUTPUT.PUT_LINE(SUBSTR(SQLERRM,1,2000));
UTL_FILE.FCLOSE(testjiao_handle);
END;
/
#执行发现编译未成功
show error
发现testjiao_handle UTL_FILE.file_type，已经写到命名块里了，不需要declare了
CREATE OR REPLACE PROCEDURE xixi
IS
testjiao_handle UTL_FILE.file_type;
BEGIN
testjiao_handle := UTL_FILE.FOPEN(&＃39;DIR_DUMP&＃39;,&＃39;testjiao.txt&＃39;,&＃39;w&＃39;);
FOR x IN (SELECT * FROM TESTJIAO) LOOP
UTL_FILE.PUT_LINE(testjiao_handle,x.ID || &＃39;,&＃39; || x.RQ ||&＃39;,&＃39;);
END LOOP;
EXCEPTION WHEN OTHERS THEN
DBMS_OUTPUT.PUT_LINE(SUBSTR(SQLERRM,1,2000));
UTL_FILE.FCLOSE(testjiao_handle);
END;
/
执行成功了
exec xixi
txt文件也生成了，但是里面没有数据。为什么？
因为把 Fclose写进异常里了，必须退出这个session，才会写进txt文件。
exit
发现txt有数据了
因为退出以后 那个 Fopen 就自动关了 否则 那个文件一直是被它打开并没有关闭
###还要继续完善这个存储过程，要把 Fclose 拿出来
###########################################################
CREATE OR REPLACE PROCEDURE xixi
IS
testjiao_handle UTL_FILE.file_type;
BEGIN
testjiao_handle := UTL_FILE.FOPEN(&＃39;DIR_DUMP&＃39;,&＃39;testjiao.txt&＃39;,&＃39;w&＃39;);
FOR x IN (SELECT * FROM TESTJIAO) LOOP
UTL_FILE.PUT_LINE(testjiao_handle,x.ID || &＃39;,&＃39; || x.RQ ||&＃39;,&＃39;);
END LOOP;
UTL_FILE.FCLOSE(testjiao_handle);
EXCEPTION WHEN OTHERS THEN
DBMS_OUTPUT.PUT_LINE(SUBSTR(SQLERRM,1,2000));
END;
/
###########################################################
exec xixi
more testjiao.txt
1,10-NOV-09,
2,20-DEC-10,
3,15-SEP-10,
这次真正ok,了。
#可查看directory里全部定义路径
select * from dba_directories;
drop directory exp_dir;
最后转下
UTL_File的使用
Create directory让我们可以在Oracle
数据库中灵活的对文件进行读写操作，极大的提高了
Oracle的易用性和可扩展性。
其语法为:
CREATE [OR REPLACE] DIRECTORY directory AS &＃39;pathname&＃39;;
本案例具体创建如下:
create or replace directory exp_dir as &＃39;/tmp&＃39;;
目录创建以后，就可以把读写权限授予特定用户，具体语法如下:
GRANT READ[,WRITE] ON DIRECTORY directory TO username;
例如:
grant read, write on directory exp_dir to eygle;
此时用户eygle就拥有了对该目录的读写权限。
让我们看一个简单的测试:
SQL> create or replace directory UTL_FILE_DIR as &＃39;/opt/oracle/utl_file&＃39;;
Directory created.
SQL> declare
2 fhandle utl_file.file_type;
3 begin
4 fhandle := utl_file.fopen(&＃39;UTL_FILE_DIR&＃39;, &＃39;example.txt&＃39;, &＃39;w&＃39;);
5 utl_file.put_line(fhandle , &＃39;eygle test write one&＃39;);
6 utl_file.put_line(fhandle , &＃39;eygle test write two&＃39;);
7 utl_file.fclose(fhandle); www.2cto.com
8 end;
9 /
PL/SQL procedure successfully completed.
SQL> !
[oracle@jumper 9.2.0]$ more /opt/oracle/utl_file/example.txt
eygle test write one
eygle test write two
[oracle@jumper 9.2.0]$
类似的我们可以通过utl_file来读取文件:
SQL> declare
2 fhandle utl_file.file_type;
3 fp_buffer varchar2(4000);
4 begin
5 fhandle := utl_file.fopen (&＃39;UTL_FILE_DIR&＃39;,&＃39;example.txt&＃39;, &＃39;R&＃39;);
6
7 utl_file.get_line (fhandle , fp_buffer );
8 dbms_output.put_line(fp_buffer );
9 utl_file.get_line (fhandle , fp_buffer );
10 dbms_output.put_line(fp_buffer );
11 utl_file.fclose(fhandle);
12 end; www.2cto.com
13 /
eygle test write one
eygle test write two
PL/SQL procedure successfully completed.
可以查询dba_directories查看所有directory.
SQL> select * from dba_directories;
OWNER DIRECTORY_NAME DIRECTORY_PATH
------------------------------ ------------------------------ ------------------------------
SYS UTL_FILE_DIR /opt/oracle/utl_file
SYS BDUMP_DIR /opt/oracle/admin/conner/bdump
SYS EXP_DIR /opt/oracle/utl_file
可以使用drop directory删除这些路径.
SQL> drop directory exp_dir;
Directory dropped www.2cto.com
SQL> select * from dba_directories;
OWNER DIRECTORY_NAME DIRECTORY_PATH
------------------------------ ------------------------------ ------------------------------
SYS UTL_FILE_DIR /opt/oracle/utl_file
SYS BDUMP_DIR /opt/oracle/admin/conner/bdump
摘自 zcywell的专栏
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