Exam 70-461 topic 1 question 113 discussion

You develop a database application. You create four tables. Each table stores different categories of products.
You create a Primary Key field on each table.
You need to ensure that the following requirements are met:
✑ The fields must use the minimum amount of space.
✑ The fields must be an incrementing series of values.
✑ The values must be unique among the four tables.
What should you do?