{keyword} Union All Select Null,null,null,null,null,null,null,null,null,null-- Zvuz -

: The attacker is attempting to determine the number of columns being returned by the original query. They add NULL values until the database stops returning an error, which reveals the table's structure.

: This is a placeholder for a legitimate search term or data input used by a web application. : The attacker is attempting to determine the

: These tools can automatically detect and block common SQLi patterns like the one you provided. : The attacker is attempting to determine the