Answer:
Explanation:
A relational database is designed to enforce the uniqueness of primary keys by allowing only one row with a given primary key value in a table. A foreign key is a column or a set of columns in a table whose values correspond to the values of the primary key in another table.
Answer:
D. Birmingham
Explanation:
Entering the search criteria "B", would yield Birmingham.
It gains purchasing power. Less money in circulation = more value.