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

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

: A website takes user input and places it directly into a SQL query without "cleaning" it first. : NULL is used because it is compatible

: 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. The attacker now knows the table has 6

: By using six NULL values, the attacker is testing if the original query has exactly six columns. : Any code that was supposed to follow

: Any code that was supposed to follow the input (like a closing quote or a WHERE clause) is ignored by the database, preventing syntax errors that would break the injection. 5. GoJB