-4331' Union All Select 34,34,34,34,34,34,34,34# Apr 2026

: These are arbitrary dummy values (or placeholders).

If the original query selects 8 columns, this query works. If it selects a different number, the database will return an error, allowing the attacker to deduce the column count by trial and error. -4331' UNION ALL SELECT 34,34,34,34,34,34,34,34#

Removing or escaping special characters like ' , # , and -- . : These are arbitrary dummy values (or placeholders)

in languages like PHP, Python, or Node.js to block this the database will return an error