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! Note on dialects: the examples below use MySQL syntax by default. Where a feature behaves differently in PostgreSQL, SQL Server or Oracle, it is called out explicitly — interviewers often probe exactly these differences. 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. The root cause is always the same: user input ends up being treated as SQL code instead of as data. To prevent it, follow these practices: 1.1. Use Prepared Statements (the real fix): Prepared statements send the SQL structure and the values to the dat...