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QWhat is a primary key in a relational database?

ID: #15427 Relational database concepts 149 views
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#15427Q ID
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Relational database conceptsTopic
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  • 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 ✔ ✖
Correct Answer: Option C

Explanation

A primary key is a column or a set of columns in a table that uniquely identifies each row. It ensures that each row in the table has a unique identifier, which is essential for data integrity and efficient data retrieval.

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