The big increase in computing power over recent years has made it possible to routinely record large volumes of information about our daily lives (and especially our health). Statistics is the essential tool for making sense of the huge quantities of data available. There are many exciting challenges – often the data that are missing or poorly recorded are at least as informative as the data that are present. The real strength of such databases comes when they are linked together to see the bigger picture, but how do we do this, and should we worry that our privacy is being invaded? In this talk we look at these issues through examples ranging from goals in world cup football to survival following a heart attack.