{keyword} Union All Select Null,null,null,null,null,null,null-- Pvwz < TRENDING ✪ >

This is the #1 defense. It treats user input as literal data, not executable code.

The string you provided is a common technique used in . Specifically: This is the #1 defense

Example (Python/psycopg2): cursor.execute("SELECT * FROM users WHERE name = %s", (user_input,)) the database usually throws an error.

Use "allow-lists" to ensure input matches the expected format (e.g., ensuring a ZIP code is only numbers). This is the #1 defense

: 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.