An attribute of one table matching the primary key of another table is calleda.foreign keyb.seconday keyc.candidate keyd.composite keyClear my choice

Break Down the Problem

1. Identify the terms: foreign key, secondary key, candidate key, composite key.
2. Understand the relationships between these keys in database terminology.

Relevant Concepts

• Foreign Key: This is an attribute in one table that links to the primary key in another table, establishing a relationship between the two tables.
• Secondary Key: This term generally refers to an attribute that can be used to access a table and may not necessarily create a relationship with another table.
• Candidate Key: This is an attribute or set of attributes that can uniquely identify a record in a table.
• Composite Key: This is a key that consists of two or more attributes to uniquely identify a record.

Analysis and Detail

• The question specifically refers to an attribute in one table that matches the primary key of another table. This directly describes the function of a foreign key.
• A foreign key establishes a link and enforces referential integrity between two tables.

Verify and Summarize

Based on the definitions and analysis of the relevant concepts, the term that describes an attribute in one table matching the primary key of another table is indeed the foreign key.

Final Answer

The correct answer is a. foreign key.