{keyword} Union All Select 34,34,34,34,34,'qbqvq'||'oqmufbfpih'||'qqbqq',34,34,34-- Onof -

: This is a string concatenation. The attacker is trying to print a unique string (like a "fingerprint") to the screen. If "qbqvqoQMUFBfpihqqbqq" appears on the webpage, the attacker knows the site is vulnerable.

If you are a developer, seeing this is a signal to audit your code immediately. Here are the gold-standard defenses: : This is a string concatenation

: This is a comment operator in SQL. It tells the database to ignore the rest of the legitimate code that follows, effectively neutralizing any security checks at the end of the original query. Why you might be seeing this If you are a developer, seeing this is

: This command tells the database to combine the results of the original query with a new, forged query. Why you might be seeing this : This

: These are "dummy" values used to match the number of columns in the original database table. If the column counts don't match, the attack fails, so hackers often guess the number of columns this way.