TDVCL1 Exam QuestionsBrowse all questions from this exam

TDVCL1 Exam - Question 31


Which statement is true about both Primary Key and Primary Index?

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Correct Answer: D

Primary Key and Primary Index can both be made up of multiple columns. This is referred to as a composite key or composite index. Composite primary keys are used to uniquely identify records in a table using more than one column, and similarly, composite primary indexes are utilized to improve the efficiency of querying those composite primary keys.

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lmtome44Option: D
Dec 3, 2023

D. They can be made up of multiple columns. Both primary keys and primary indexes can be made up of multiple columns, a concept known as a composite primary key or composite primary index. This is particularly useful for tables where a single column may not be able to uniquely identify each record.