SQL Injection: Understanding and Prevention

SQL Injection (SQLi) is a type of vulnerability that occurs when an attacker can interfere with the queries that an application makes to its database.

It allows attackers to view data they are normally not able to retrieve, or even modify and delete it.

Preventing SQLi involves using prepared statements with parameterized queries instead of concatenating user input directly into queries.

Input validation and using the principle of least privilege for database accounts are also critical defensive measures.