<Tr> <Td> <Ul> <Li> Information security (main article) </Li> </Ul> </Td> </Tr> <Ul> <Li> Information security (main article) </Li> </Ul> <Li> Information security (main article) </Li> <Tr> <Th> Related security categories </Th> </Tr>

Explain sql injection and highlight measures to counter this type of attack on databases