Abdusaid Razokov,
1) firebird.conf: установите ExternalFileAccess = Full, затем рестарт ФБ
2) test:
C:\1INSTALL\FIREBIRD\Data>isql
Use CONNECT or CREATE DATABASE to specify a database
SQL> create database 'tmp120605.fdb'; commit;
SQL> create table my_table EXTERNAL FILE 'C:\TEMP\my_table.txt'(xml char(2048), crlf char(2));
SQL> commit;
SQL> insert into my_table values('<title>Hello World!</title>', ascii_char(13)||ascii_char(10));
SQL> insert into my_table values('<body>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor inci
didunt ut labore et dolore magna aliqua.</body>', ascii_char(13)||ascii_char(10));
SQL> commit;
SQL> quit;
4) result:
C:\TEMP>echo --- the end --- >> C:\TEMP\MY_TABLE.TXT
C:\TEMP>type C:\TEMP\MY_TABLE.TXT
<title>Hello World!</title>
<body>Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna al
iqua.</body>
--- the end ---