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

: 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

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

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. : This is a SQL comment, which tells

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

If the column count is wrong (e.g., the original query has 7 or 9 columns), the database will return an error. : Appends a new set of results to

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

: Attempts to select 8 columns of "null" data. What this Payload Does : Attempts to select

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.