icarnegieSSD7数据库课程选择题
1.
An E-Commerce database contains data about customers, products, orders, system response times, etc. Which of the following can be specified as integrity constraints in an E-Commerce database system?
No two products can have the same product ID.
The DBMS response time for all Web requests should be at most 2 seconds.
A customer order cannot have more than one shipping address.
