{keyword} Union All Select Null,null,null,null,null,null-- Gojb Guide

: This "comments out" the rest of the original SQL query written by the developers.

: The database returns a row of empty data. The attacker now knows the table has 6 columns and can proceed to more dangerous injections, such as UNION SELECT username, password, NULL... to steal sensitive information. : This "comments out" the rest of the

If the page returns an error (like "The used SELECT statements have a different number of columns"), the attacker will try again with five or seven NULL values until the error disappears. 4. -- (The Comment) In SQL, double-dashes signify the start of a comment. to steal sensitive information

This string is a classic example of a used by security researchers and attackers to probe a website's database for vulnerabilities. -- (The Comment) In SQL, double-dashes signify the

Here is a detailed breakdown of what each component of this specific string does: 1. {KEYWORD}

: NULL is used because it is compatible with almost any data type (integers, strings, dates, etc.).

Developers should use Parameterized Queries (Prepared Statements), which treat user input as literal data rather than executable code.