How do you execute SQL queries and retrieve results using Perl's DBI module?

To execute SQL queries and retrieve results using Perl's DBI (Database Interface) module, you need to follow a series of steps. Here's an in-depth explanation of the process: 1. Establish a Database Connection: * First, you need to establish a connection to the database using the `DBI->connect()` method. This method takes parameters such as the database type, hostname, database name, username, password, and any additional options. * Example: ``` perl`use DBI; my $dbh = DBI->connect("DBI:mysql:database=testdb;host=localhost", "username", "password");` ``` 2. Prepare the SQL Statement: * Once the connection is established, you can prepare the SQL statement using the `$dbh->prepare()` method. This method takes the SQL query as a parameter and returns a statement handle. * Example: ``` perl`my $stmt = $dbh->prepare("SELECT FROM employees WHERE department = ?");` ``` 3. Bind Parameters (if necessary): * If your SQL stateme....