-1469 Union All Select 34,34# Today

If a website isn't "sanitizing" user input, an attacker can use these tricks to:

Are you looking to write a on how to prevent these attacks, or more of a beginner's overview of web security? -1469 UNION ALL SELECT 34,34#

: This operator combines the results of two different SELECT statements into a single result set. If a website isn't "sanitizing" user input, an

: This is a dummy value. By using a negative or non-existent ID, the attacker ensures the first part of the query returns no results, making room for the injected data to show up. -1469 UNION ALL SELECT 34,34#

The best way to prevent this is to use (parameterized queries). This ensures the database treats the input as literal text, not as a command to be executed.