Mega'and(select*from(select Sleep(2))a/**/union/**/select 1)=' -

: Only allow expected characters. For example, if a field is for a username, don't allow special characters like ' , ( , or * .

: This is used to combine the results of the original query with a new query, often used to extract data like usernames or passwords. : Only allow expected characters

: Change prices in a store or wipe the entire database. How to Prevent This (The Guide) : Change prices in a store or wipe the entire database

To protect an application from this specific type of attack, developers should follow these best practices: : A WAF can detect and block common

If the website takes exactly 2 seconds longer than usual to load, the attacker knows the site is vulnerable to SQL injection. :

The string you provided is a classic example of a payload designed to test for vulnerabilities in a web application's database.

: A WAF can detect and block common patterns like sleep() or union select before they even reach your server.