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Which of the following can be addressed by enforcing a referential integrity constraint?

All phone numbers must include the area code

Certain fields are required (such as the email address, or phone number) before the record is accepted

Information on the customer must be known before anything can be sold to that customer

Then entering an order quantity, the user must input a number and not some text (i.e., 12 rather than

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category More Database Management System Topics

Miscellaneous or General

Relational Algebra

Database Systems

Data Models

The Relational Database Model

Entity Relationship (ER) Modeling

Advanced Data Modeling

Normalization

Structured Query Language (SQL)

Advanced SQL

Database Design

Transaction and Concurrency

Data Warehouses

Database Administration

Mixed

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