Merge Excel files

There is a need to compile a database: the database covers various information about the British university system: It contains information such as the number of international students and professors, male-female breakdowns, average academic age, and so on. A range of years (from 2007 to 2020) is assigned for each characteristic and university. And for each of these, there are already organized Excel files to be merged. The structure of the final database is already assigned and is ready to be complimented.