Combine two integers to create a unique number

Question

Good Morning,

I was looking for a way to combine two integers to create a unique number, I have two tables that I need to combine into a third table with unique numb

Answer 1

I would combine the ID like this:

ID = ClassID * 1000 + SchoolID

You can then get the SchoolID like this:

SchoolID = ID % 1000

and you can get the ClassID like this:

ClassID = ID / 1000