{keyword}' Union All Select Null,null,null,null,null,null,null,null-- Jynz -

If the original query has 8 columns, the page will likely load normally or show an extra row of empty data.

The primary objective of using this payload is . For a UNION operation to work, the injected query must have the exact same number of columns as the original query.

This specific string is designed to be appended to a vulnerable input field (the {KEYWORD} in your example) to probe the database structure: : Closes the original string literal in the SQL query. If the original query has 8 columns, the

: Attempts to select 8 columns of "null" data.

: This is a SQL comment, which tells the database to ignore the rest of the original, legitimate query that follows. The Goal of the Attack This specific string is designed to be appended

The payload you provided, ' UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL,NULL,NULL-- , is a common pattern used in to determine the number of columns returned by an original database query. What this Payload Does

NULL is used because it is compatible with almost any data type (string, integer, date, etc.), ensuring the query won't fail due to data type mismatches. The Goal of the Attack The payload you

: Appends a new set of results to the original query's output.