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The property (or set of properties) that uniquely defines each row in a table is called the:

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The property (or set of properties) that uniquely defines each row in a table is called the: (a) Identifier (b) Index (c) Primary key (d) Symmetric key This question was addressed to me during an interview. My doubt is from Ordered Indexing and Hashing in chapter Indexing and Hashing of Database Management Select the correct answer from above options Interview Questions and Answers, Database Interview Questions and Answers for Freshers and Experience

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Right choice is (c) Primary key The best I can explain: Primary is used to uniquely identify the tuples.

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