{keyword} Union All Select Null-- Kjag (Limited Time)

The sequence you provided, "{KEYWORD} UNION ALL SELECT NULL-- KJAg" , is a classic example of a . Purpose of the Payload

This specific string is typically used by security researchers or attackers to test for vulnerabilities in a web application's database interactions. {KEYWORD} UNION ALL SELECT NULL-- KJAg

: The UNION operator combines the results of two or more SELECT statements. By using SELECT NULL , a tester can determine how many columns the original database query expects without triggering a data-type error. The sequence you provided, "{KEYWORD} UNION ALL SELECT

: This is a SQL comment symbol. It tells the database to ignore the rest of the original query, effectively "breaking" the intended logic to execute the injected command instead. The sequence you provided