Null,'qbqvq'||'zztyernefl'||'qqbqq',null,null,null,null,null,null,null-- Ijiy | {keyword} Union All Select

The string you provided is a classic example of a used for a "UNION-based" attack. The "Anatomy" of the Payload

If you are seeing this on your own website logs or search bar, it means someone (or an automated bot) is testing your site for security holes. To prevent this: The string you provided is a classic example

Instead of just saying "Gardening," you say: "Show me Gardening books AND ALSO go into the restricted office, look at the employee payroll, and tell me the name on the second paycheck." It tells the database to ignore everything that

: This is a comment marker in SQL. It tells the database to ignore everything that comes after it, effectively "breaking" the rest of the original, legitimate code so it doesn't cause an error. A Helpful Story: The Librarian and the Hidden Note look at the employee payroll