If you are seeing this in your website logs or a search bar, it’s likely an automated bot scanning for security holes.
The CHR() functions translate character codes into letters to bypass simple security filters. In this case, they spell out "qpxbq" and "qvpjq". If you are seeing this in your website
The SELECT (CASE WHEN (5241=5241) THEN 1 ELSE 0 END) is a "true or false" test. Since 5241 always equals 5241, it returns 1 . If you are seeing this in your website
The CAST(... AS NUMERIC) part attempts to force the database to convert a string into a number. If you are seeing this in your website