{keyword} Union All Select Null,null,null,null,null,null,null-- Pvwz May 2026

The string you provided is a common technique used in . Specifically:

Example (Python/psycopg2): cursor.execute("SELECT * FROM users WHERE name = %s", (user_input,)) The string you provided is a common technique used in

: The attacker uses NULL values to figure out exactly how many columns the original table has. If the number of NULL s doesn't match the original column count, the database usually throws an error. use these industry-standard defenses:

If you're building an application, you should never let user input go directly into a database query. Instead, use these industry-standard defenses: The string you provided is a common technique used in