SQL Injection with Example in Hindi l SQL Tutorial скачать в хорошем качестве

SQL Injection with Example in Hindi l SQL Tutorial

SQL Course: SQL Injection with Example in Hindi #sql #sqlforbeginners SQL Injection is a technique used by attackers to exploit vulnerabilities in an application's database layer. It involves injecting malicious SQL code into an application's input fields to gain unauthorized access to sensitive data. For example, consider a login page for a website that uses SQL to authenticate users. The page may have a username and password field that accepts user input. An attacker can input malicious SQL code in the username field to bypass the authentication process and gain access to the website's database. Here's an example of an SQL Injection attack: Suppose the username field accepts the following input: "SELECT * FROM users WHERE username = '$username' AND password = '$password'" An attacker can input the following malicious code in the username field: "admin' OR 1=1 --" The resulting SQL code would be: "SELECT * FROM users WHERE username = 'admin' OR 1=1 --' AND password = '$password'" The "--" at the end of the code is a comment symbol in SQL, which ignores everything after it. This means that the password field is effectively ignored, and the attacker is logged in as the admin user. This type of attack can be prevented by using parameterized queries, input validation, and limiting user privileges in the database.