{keyword} Union All Select Null-- Kjag Review

: 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.

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

: Someone is trying to see if they can extract sensitive data from your database. : This is a SQL comment symbol

If this was found in your own application's logs or user inputs, it is a sign that you should ensure you are using prepared statements or parameterized queries to prevent SQL injection attacks. {KEYWORD} UNION ALL SELECT NULL-- KJAg