{keyword} And 5161=2181-- Qoyo -

: This is a SQL comment marker (in MySQL, PostgreSQL, etc.). It instructs the database engine to ignore everything that follows it in the query.

If the page loads normally (the same as the original, legitimate query), it tells the attacker that the query is being evaluated, but the AND False didn't change the outcome. {KEYWORD} AND 5161=2181-- qoyo

: This is a Boolean statement. The server evaluates this as False because 5161 does not equal 2181. : This is a SQL comment marker (in MySQL, PostgreSQL, etc

If the page breaks, returns an error, or shows no content, it confirms that the application is vulnerable to SQL injection because the AND False successfully changed the query's behavior. : This is a Boolean statement

The attacker adds this to a URL parameter or input field (e.g., ?id=1' AND 5161=2181-- qoyo ). Boolean Logic Test:

This is a basic attempt to see if security measures are in place.