Sql Interview Questions for 10 Years Experience
As an experienced SQL professional, you might encounter challenging questions during a job interview. In this blog post, we will explore 10 common SQL interview questions and provide in-depth explanations along with relevant examples. Let's dive in! Contents [ hide ] What is SQL Injection, and how can you prevent it? SQL Injection is a malicious attack where an attacker manipulates input data to execute unintended SQL statements. It can lead to unauthorized access, data breaches, and data manipulation. To prevent SQL Injection, follow these best practices: 1.1. Use Prepared Statements: Prepared statements or parameterized queries separate SQL code from data input, preventing attackers from injecting malicious SQL code. Here's an example in PHP: $stmt = $pdo->prepare('SELECT * FROM users WHERE username = :username'); $stmt->bindParam(':username', $username); $stmt->execute(); 1.2. Sanitize User Input: Validate and sanitize user input ...