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5 months ago
Which of the following statements is not true for primary keys in a relational database system?

• They can be used to create relationships between tables.

• They must contain numeric data.

• They uniquely identify a row in a table.

• They can be part of relational integrity constraints.
Textbook 
Database Processing: Fundamentals, Design, and Implementation
Edition: 15th
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wrote...
5 months ago
They must contain numeric data.
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