: This operator combines the results of two different SELECT statements into a single result set.
Are you looking to write a on how to prevent these attacks, or more of a beginner's overview of web security?
If you were looking to write a blog post about this topic, here is a quick breakdown of what it means and why it matters: What is SQL Injection (SQLi)? -1469 UNION ALL SELECT 34,34#
If a website isn't "sanitizing" user input, an attacker can use these tricks to:
: 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. : This operator combines the results of two
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.
SQL injection is a web security vulnerability that allows an attacker to interfere with the queries that an application makes to its database. Breaking Down the Payload: If a website isn't "sanitizing" user input, an
: The attacker is trying to match the number of columns in the original query. If the page loads "34," they know the table has two columns and they can start pulling real data (like usernames or passwords) in those slots.