Is Guid the best identity datatype for Databases?

Question

It is connected to BI and merging of data from different data sources and would make that process more smooth.

And is there an optimal migration strategy from a data

Answer 1

I used to not like GUID at all, but I've grown to love it. I love it because it is relatively uniform and adopted, and I end up writing less code by using it, and maintaining that code, than I would normally write and maintain.

It is especially useful for storage of files, where you need to guarantee that a filename is unique, in a directory with a potentially large number of files, including pre-existing files.