Along with the social and the rapid development of modern information technology, people on the database database application with dependence is growing, the emergence of the database to people's life and work has brought great convenience, but is followed by more and more security problems, should not be ignored. When our database data is damage, leakage and change, will work to our life bring inconvenience. But the database system itself has certain security protection measures, to a certain extent, helps us to protect the security of database data, but even so, in a SQL database in use process, will appear this or that kind of security issues, when unpredictable security threat comes, we may be effective ways to take the initiative to prevent these safety problems, when we know the correct way, and can effectively, protect us in the true sense of the database security, so the security of the SQL database problem still cannot be ignored. Based on the above, this article will focus on the SQL database security problems is studied and discussed.