-9825 Union All Select 34,34,34,34,34,34,34,34,34,34# < FHD >

: The attacker is playing a guessing game. A UNION attack only works if both queries have the exact same number of columns . By repeating "34," the attacker is testing if the database table has 10 columns. If the page loads without an error, they’ve found the "shape" of the table.

The string is designed to trick a website’s search bar or login field into running extra commands it wasn't supposed to. -9825 UNION ALL SELECT 34,34,34,34,34,34,34,34,34,34#

: 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. : The attacker is playing a guessing game

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 If the page loads without an error, they’ve

: 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."