{keyword} Union All Select Null,null,null,null,null,null,null,null-- Ppsq -

: 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

: 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. : This is a SQL comment marker that

: An attacker starts with one NULL and keeps adding more (e.g., NULL, NULL , then NULL, NULL, NULL ). : This is a SQL comment marker that

: 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

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