What is the Thomson Reuters tool that is used in universities?
It is a huge financial database which consents you to export data easily via the datastream tool for excel. There you can find common data (such as those available via online databases, e.g. yahoo finance or investing) but also intra-day data, indexes, analysis and the platform consent you to apply directly some statistical techniques. It is a great source, useful especially when you cannot get data from free sources.