In the Data Awareness Programme to students, I have shown below slide to let them know on how many versions have released, so far. As you can see below, the first ever version released was in 1989 and we are in 2014 now. SQL 2016 CTP versions are available but expected to release in beginning of 2016. There were totally 13 releases in last 25 years and the product has become very much stronger than ever. SQL 2016 is going to be a huge one with easy integration to cloud.