Perl programming updating data file
DBI is a Perl module, well documented in both online sources and the "Programming the Perl DBI" book by Alligator Descartes, Alistair Carty, Tim Bunce and Linda Mui (O'Reilly, ISBN:1565926994) but still, I can see questions about using DBI with Oracle on Oracle USENET groups. Oracle has many features and data types, while using DBI with each particular feature is not always entirely trivial.The purpose of this article is to cover many of those uses from Perl practitioner's point of view.Describing installation on Unix or Linux and omitting Windows or VMS would open me for the accusations of being OS biased.As I really am biased toward one type of OS, I wanted to hide that fact and cover just the common parts.
It will also not cover the installation of Perl, Oracle, DBI or DBD:: Oracle. This is simply an introduction to using Oracle with Perl DBI.
On Unix systems, the web process runs under its own userid, typically the "web" or "nobody" user.
Unfortunately this means the server doesn't have permission to create files in your directory.
You can do this by reading and writing data files (often called file I/O).
Most web servers run with very limited permissions; this protects the server (and the system it's running on) from malicious attacks by users or web visitors.
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As you start to program more advanced CGI applications, you'll want to store data so you can use it later.