: This is SQL shorthand to comment out the rest of the legitimate code, ensuring the injected command runs cleanly. The "DJGP" Element
It looks like you've provided a common SQL injection payload ( UNION ALL SELECT NULL... ) followed by the initials "DJGP." {KEYWORD} UNION ALL SELECT NULL,NULL,NULL-- DJGP
If you expect a zip code, don't accept a string that starts with UNION . : This is SQL shorthand to comment out
While this might seem like just a string of code, it’s actually a great jumping-off point for a blog post about and database protection . Beyond the Payload: Understanding SQL Injection and "DJGP" While this might seem like just a string
: The attacker is trying to append their own results to your original database query.
The snippet {KEYWORD} UNION ALL SELECT NULL,NULL,NULL-- is a classic attack pattern.
: They use "NULL" to figure out exactly how many columns your database table has without triggering a data-type error.