-9825 Union All Select 34,34,34,34,34,34,34,34,34,34# May 2026

Once an attacker confirms that 10 columns work, they won't just select the number "34." They will replace those numbers with sensitive commands, such as: SELECT user, password, email FROM users

: The attacker starts with a value that likely doesn't exist (like a negative ID number). This "breaks" the original intended query, forcing the database to ignore the real results and display the attacker's fake results instead. -9825 UNION ALL SELECT 34,34,34,34,34,34,34,34,34,34#

: This is a comment character in MySQL. It tells the database to ignore everything that comes after it, effectively cutting off the rest of the website's original, legitimate code. The "Aha!" Moment Once an attacker confirms that 10 columns work,

Suddenly, instead of seeing a product description or a blog post, the website displays the admin’s login credentials directly on the screen. Why It Matters It tells the database to ignore everything that

: This is the heart of the exploit. The UNION operator tells the database, "Take the results of the first search and glue them to the results of this second search."

This "subject" is a classic example of a payload, specifically a Union-Based Injection attack. To the untrained eye, it looks like gibberish; to a database, it’s a command to leak data. The Anatomy of the Attack

The string is designed to trick a website’s search bar or login field into running extra commands it wasn't supposed to.