What is DBI basics in Perl?

DBI (Database Interface) is a generic database interface for Perl that provides a consistent method for interacting with various database systems. It allows users to connect to databases, execute SQL statements, and retrieve results in an efficient and standardized way. The DBI module works with multiple database drivers, making it a versatile choice for database programming in Perl.

Key operations with DBI include:

  • Connecting to a database
  • Preparing SQL statements
  • Executing queries
  • Fetching results from queries
  • Disconnecting from the database

Here is a simple example of using DBI to connect to a MySQL database:

#!/usr/bin/perl use strict; use warnings; use DBI; my $dsn = 'DBI:mysql:database_name:host_name'; my $username = 'user'; my $password = 'password'; my $dbh = DBI->connect($dsn, $username, $password) or die "Could not connect to database: $DBI::errstr"; my $sql = 'SELECT * FROM table_name'; my $sth = $dbh->prepare($sql); $sth->execute(); while (my @row = $sth->fetchrow_array()) { print join(", ", @row), "\n"; } $sth->finish(); $dbh->disconnect();

DBI Perl database interface SQL database programming DBI module

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