Question

我有一个Oracle数据库，我想将数据导出到一个文件。但是，文件名，扩展名和分隔符将从表中获取值。问题是我无法使用表中的值。你能建议我这样做吗？或者，如果我可以批量执行此操作？

表（id，路径，文件名，扩展名，分隔符）

script.sql

conn ....
variable fullpath varchar2(20);
variable filename varchar2(10);  
variable extension varchar2(5);  
variable sep varchar2(1);

begin
  select filename, path, extension,separator
  into :filename, :fullpath, :extension, :sep
  from Table;
end;
/

set separator sep

spool fullpath||filename||'.'||extension;
... select queries...
spool off;

此致

Answer 1

SPOOL是一个SQLPlus命令，因此您无法动态地在PlSQL块中使用它。

一种方法是在运行时创建第二个脚本，根据您的查询动态构建，然后运行它来完成工作。例如：

conn ...
set serveroutput on
set feedback off
variable fullpath varchar2(20);
variable filename varchar2(10);  
variable extension varchar2(5);  
variable sep varchar2(1);
/* spool to a fixed file, that will contain your dynamic script */
spool d:\secondScript.sql
begin
  select 'filename', 'd:\', 'txt', '|'
  into :filename, :fullpath, :extension, :sep
  from dual;

  /* write the second script */

  dbms_output.put_line('set colsep ' || :sep);
  dbms_output.put_line('spool ' || :fullpath || :filename || '.' || :extension);
  dbms_output.put_line('select 1, 2, 3 from dual;');
  dbms_output.put_line('spool off');
end;
/
spool off  

/* run the second script */
@d:\secondscript.sql

这给出了：

SQL> sta C:\firstScript.sql
Connected.
set colsep |
spool d:\filename.txt
select 1, 2, 3 from dual;

         1|         2|         3
----------|----------|----------
         1|         2|         3

<强> d：\ FILENAME.TXT ：

         1|         2|         3                                                
----------|----------|----------                                                
         1|         2|         3

Answer 2

您可以使用the new_value clause的替换变量和the column command。

conn ....

column spool_path new_value sub_spool_path noprint
column sep new_value sub_sep noprint
set verify off
set termout off

select path || filename ||'.'|| extension as spool_path, separator as sep
from Table;

set termout on

set separator &sub_sep

spool &sub_spool_path
... select queries...
spool off;

SQLPlus动态假脱机文件名

2 个答案: