- A A key used for sorting data in a table
- B A key used for joining two tables
- C A key that uniquely identifies a row in a table
- D A key that represents a relationship between tables
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Answer:
D
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A foreign key is a column or a set of columns in a table that refers to the primary key of another table. It establishes a relationship between two tables by enforcing referential integrity and allowing data to be shared and connected between them.
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