One of the biggest concerns for Web Developers while developing something with SQL, is to avoid SQL-Injection problems, because those are the most common security flaws.
But there are also another flaws that you should be aware about, for example, column truncation vulnerabilities.
This security flaw it’s related with the lack of input length validations and it seems that it is affecting a lot of known applications.
Stefan Esser wrote a great tutorial about this subject it’s a must read.