{keyword} Union All Select: Null,null,null,null,null,null,null,null-- Ppsq
: 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
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 : When the number of NULL s matches
: 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 Purpose of the Payload : This is a
: 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. : When the number of NULL s matches