Why Keys Are Important
Establishing Keys for Each Table
Reviewing the Initial Table Structures
By now you've identified all the subjects that the database will track and defined the table structures that will represent those subjects. Furthermore, you've put the structures through a screening process to control their makeup and quality. In this next stage of the database-design process, you'll begin the task of assigning keys to each table. You'll soon learn that there are different types of keys, and each plays a particular role within the database structure. All but one key is assigned during this stage; you'll assign the remaining key later (in Chapter 10) as you establish relationships between tables.