Some examples can be found here:
<a href="http:&#x2F;&#x2F;stackoverflow.com&#x2F;questions&#x2F;5741187&#x2F;sql-injection-that-gets-around-mysql-real-escape-string" rel="nofollow">http:&#x2F;&#x2F;stackoverflow.com&#x2F;questions&#x2F;5741187&#x2F;sql-injection-tha...</a>