-3216' Union All Select 34,34,34,34# -

: In MySQL, this symbol marks the rest of the original query as a comment , effectively deleting the remaining code (like WHERE clauses or authentication checks) to bypass security. Purpose of This "Piece"

The string -3216' UNION ALL SELECT 34,34,34,34# is a classic example of a used to exploit vulnerabilities in database-driven applications. Breaking Down the Payload -3216' UNION ALL SELECT 34,34,34,34#

: This operator combines the results of the original query with a new one. By using UNION ALL , the attacker can inject their own data into the results page. : In MySQL, this symbol marks the rest

In the context of cybersecurity testing or exploitation, this "piece" of code is typically used to: By using UNION ALL , the attacker can

: If the page displays the number "34" several times, it confirms the site is vulnerable to SQL injection.