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

: This is a comment operator in SQL. It tells the database to ignore the rest of the original query, preventing errors from trailing code. How to Prevent This

: This attempts to combine the results of the original legitimate database query with a new query controlled by the attacker. : This is a comment operator in SQL

Example (Python/psycopg2): cursor.execute("SELECT * FROM users WHERE name = %s", (user_input,)) )) If you're building an application

If you're building an application, you should never let user input go directly into a database query. Instead, use these industry-standard defenses: : This is a comment operator in SQL

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