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If a relation can have more than one record containing the same search key value, the search key is said to be a __________

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If a relation can have more than one record containing the same search key value, the search key is said to be a __________

(a) Unique search key

(b) Non unique search key

(c) Multiple search key

(d) Identical search key

I got this question by my school principal while I was bunking the class.

The above asked question is from B+ trees topic in portion Indexing and Hashing of RDBMS

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The correct option is (b) Non unique search key

For explanation: If a relation can have more than one record containing the same search key value, the search key is said to be a non-unique search key. A problem with non-unique search keys is inefficiency during delete operations.

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