SQL Tutorial – What is SQL Injection & Why It is Used


While learning SQL tutorial, you must have gone through Sql injection. Ever thought what is Sql injection and how it is useful in industries? SQL Injection is one of the many web attack mechanisms used by hackers to steal data from organizations. It is perhaps one of the most common application layer attack techniques used today. It is the hacking procedure that attempts to pass SQL commands via a web application for execution by back-end database. If not sanitized properly, web applications may result in SQL Injection attacks that allow hackers to view information from the database and/or even delete/alter it.

When an attacker knows that a system is open to SQL Injection, he is able to inject SQL Query / Commands through an input form field. This is equivalent to handing the attacker your database and allowing him to execute any SQL command including DROP TABLE to the database. Firewalls and similar threat detection mechanisms provide little defense against such web attacks. Since your website needs to be public, security mechanisms will allow public web traffic to communicate with your databases servers through web applications.

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