{keyword} Union All Select Null,null,null,null,null,null,null,null-- Ppsq [UPDATED]

: This is a SQL comment marker that tells the database to ignore the rest of the original query, preventing errors from leftover code. How it Works

Once an attacker knows there are 8 columns, they can replace the NULL values with commands to extract sensitive data, such as usernames, passwords, or database versions. SQL injection UNION attacks | Web Security Academy

: When the number of NULL s matches exactly (in your case, 8 columns), the page will load normally or show an extra blank row, confirming the database structure. Why This Matters : This is a SQL comment marker that

: If the number of NULL values does not match the original query's column count, the server usually returns an error (like a 500 Internal Server Error).

The string you provided is a classic payload. It is not a feature of a specific software product but rather a technique used by security researchers and attackers to probe databases for vulnerabilities. Purpose of the Payload Why This Matters : If the number of

: An attacker starts with one NULL and keeps adding more (e.g., NULL, NULL , then NULL, NULL, NULL ).

: This represents the original input (like a product category or search term) that the application expects. Purpose of the Payload : An attacker starts

: Attackers use NULL because it is compatible with almost every data type (integers, strings, dates), making it the "safest" way to avoid syntax errors while testing column counts.