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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 keyI 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

Answer»

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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